ONYX FICTIONSpecial brew in the lab: A record of the senior and Jiaqi's late-night descent into depravity.
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Special brew in the lab: A record of the senior and Jiaqi's late-night descent into depravity.

♙ Anonymous◷ 2026-08-19◉ 0
Real experience

After returning from the Thailand trip, life seemed to have regained calm, yet in the empty research lab late at night, everything quietly spiraled out of control. A doctoral senior used specially made coffee as the medium to step by step drag Jiaqi into a bodily game she could not escape. Drugs and semen intertwined; although her mind was clear, her whole body was powerless, and the pure junior sister gradually sank under the double assault of power and desire.

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Thinking that my girlfriend is about to graduate soon, I hope this story can be dedicated to her, who has worked hard all the way through her studies. May her academic work go smoothly, keep it up! After returning to the country, life went on as usual, but after fully relaxing from the trip, work indeed felt especially energetic.

Although during the latter part of the trip, I experienced some 'relaxing' nightlife for men under the guidance of Captain A Biao, and felt a slight guilt toward my girlfriend, my girlfriend seemed preoccupied and didn't particularly question me about this part, which surprised me.

After returning to the country, my life, after a brief period of adjustment, resumed a series of busy activities. I sometimes couldn't help but wonder: do people work hard to have a better life, or is hard work a form of self-destruction used to murder the quality of people's lives? Apart from interest and achievement, what's left isn't just the material life bought with money? Is this really all there is to my life? So, on this depressing night of overtime, I thought again of the beautiful window in my soul: my girlfriend Jiaqi.

It's past 8 p.m. now. The office is deserted, leaving only me.

Picked up the phone and dialed my girlfriend.

"HI~~~" From the other end of the phone came my girlfriend’s bright, clear, alluring, and charming voice.

"Baby, are you still in the laboratory? Still busy! Have you eaten? Don't wear yourself out!"

My series of greetings revealed my concern.

"Sigh, Jie, during that period when we were out having fun, I fell behind on too many things. Now I'm chasing after every one of them, so I can only accept my fate and work a little harder."

Jiaqi replied helplessly.

"Baby, so now you're the only one left in the laboratory? Wouldn't that be dangerous!"

“Hehe, no need to worry about me.

Senior Cai Tou is still here! Ha! It's because I dragged him into it!

Cai Tou's name is Cai Yanliang, a senior in Jiaqi's doctoral program. Jiaqi's master's thesis and the National Science Council project were also guided by him. Because Cai Tou's project was about to submit its mid-term report, he and my girlfriend could be said to be an unconventional pair of lovebirds sharing the same fate.

I've seen this 'Caitou' a few times when visiting my girlfriend. True to his nickname, he's short and stocky, usually wearing thick-rimmed glasses. To describe my impression of him, he's probably like the kind of otaku you often see on TV, holed up at home all day. According to my girlfriend, after graduation he plans to become a postdoctoral researcher or go abroad, not entering the industry. It fits my observation of him perfectly.

“What is that Cai guy doing? He isn’t playing games on the side, is he!”

I asked curiously.

"Hey, the senior doesn’t have such a conscience! He went next door to make coffee. Haha, lately because of staying up late, almost every day he goes to the professor’s lounge next door to make coffee and brings it back for us to drink together; it feels pretty good!"

My girlfriend said with satisfaction.

"Mm-mm, that's good! I'm also rushing my cases lately, so don't come back too late! When I have time I'll come find you, so keep working hard!"

After saying that, I bid my girlfriend goodbye and went back to burying myself in my work.

After hanging up the phone, my girlfriend Jiaqi rubbed her eyes. She was indeed a bit sleepy. Staying up late for several consecutive days was a huge burden on her physically.

If it weren't for the coffee brewed by my senior, I wouldn't know how to keep going.

Speaking of which, the coffee brewed by Caicai really has a somewhat special flavor. It always feels different from what you drink outside, yet hard to pinpoint, just feeling that amidst the richness there's also a bit of spicy bitterness.

Jiaqi looked at the report on the screen and planned to get up and go next door to help take a look, while also stretching her limbs a bit. Jiaqi tiptoed quietly around to the window of the professor’s office next door and peered in.

Seeing Cai Tou with his back to the window facing the coffee machine, a full pot of rich coffee was already brewed. Cai Tou casually grabbed two large thermoses and poured the coffee in. It was clear one was for Jiaqi and the other was for himself.

Jiaqi saw that everything was already brewed and there was nothing else she could help with, so she didn’t say goodbye either and turned to leave. Suddenly, she saw Cai Tou set the cup on the table, pause for a moment, then pull down his jeans belt, along with his underwear, to his ankles, exposing his genitals.

Jiaqi was startled. If she had not happened to come by today, she really could not have guessed why Senior Cai Tou needed to expose his lower body just to make coffee!?

Not knowing what to do? That fleeting glance actually stirred up Jiaqi’s curiosity, so Jiaqi slowly and stealthily hid by the windowsill and secretly peeked inside, wanting to find out what was going on.

At this moment, Cai Tou took out a photo from his pocket, placed a cup of coffee in front of his crotch, and suddenly started jerking off slowly toward the coffee cup! While stroking, he let out low growls at the photo: 'Slut! Fuck you to death, I'll fuck you to death, oh oh... I want you to suck my cock, shoot my cum into your mouth... oh oh oh...'

As Jiaqi peered curiously through the light coming from the research room, she saw the photo in Cai Tou’s hand flicker. Jiaqi suddenly gasped inwardly; it turned out to be a set of swimsuit photos she had posted online before, from when she had participated in a photography club as a model for outdoor shoots! And Cai Tou had printed them out and was jerking off to them! Jiaqi was filled with panic, muttering nonstop: “How could this be? Could it be... could it be that senior he... he wants to...” At that moment, Cai Tou suddenly let out a low growl and shot a thick stream of semen all into the coffee cup he was holding! Cai Tou still wasn’t quite satisfied, so he casually smeared the remaining sticky semen on his hand around the rim of the coffee cup, coating it with a layer.

At this point, Jiaqi also understood what was happening and couldn't help but blush: 'Has senior been making coffee like this for me all these days? No wonder... no wonder the taste was a bit... What should I do?' The thought that she might have unknowingly drunk quite a bit of Caitou's semen made Jiaqi feel dizzy. While Caitou wasn't looking, she quickly ran back to her research desk, pretending nothing had happened, but her heart was pounding, unsure how to face the specially made coffee about to be served.

While Jiaqi was calming her inner excitement, the door to the research room opened. Caitou, as usual, brought two cups of coffee to Jiaqi, smiled, and handed one over: 'Here! Junior, drink it while it's hot! You'll feel more energetic after drinking it.'

Jiaqi saw that the cup Cai Tou had brought over was indeed the coffee she had just seen filled with semen, and she couldn’t help but blush deeply.

Seeing Cai Tou's hand hanging in the air for several seconds, Cai Tou asked hesitantly, 'What's wrong? Hurry up and take it! My arm's getting sore from holding it so long.'

Jiaqi could only awkwardly reach out and take it, but she just held it in her hands at a loss.

Caitou leaned against Jiaqi's desk, took a couple sips of his coffee, and seeing Jiaqi not drinking, asked, 'What's wrong? Drink up quickly! It won't be good when it cools! Don't you always like a hot cup of coffee to perk up? What's up today?'

Jiaqi was extremely embarrassed, and too shy to expose the lie, so she had no choice but to say awkwardly: “It... it’s nothing, just... just...” “Just what? Or do you think the stuff I made for you tastes bad?”

Caitou deliberately put on a stern face. After all, he was a senior doctoral student, and Jiaqi suddenly felt a chill, not wanting to offend him. She had to say, 'Nothing's wrong, I... I'll drink...'

Blushing, she glanced at Caitou. The thought of having to drink his semen in front of this man made her feel ashamed and embarrassed. But seeing Caitou's steady gaze fixed on her, she slowly raised the cup, sipping the coffee in her hand bit by bit. Regardless of the taste, she lightly furrowed her brows and drank the coffee in one go.

Seeing Jiaqi finally finish the coffee in her hand, Caitou couldn't help but show a satisfied smile.

“How does it taste? Do you like it?”

Caitou said to Jiaqi with a smile.

Jiaqi could only hang her head in shame and nod, not daring to look up at Cai Tou.

Noticing the sexy junior in front of him looking uneasy, Caitou slowly walked behind Jiaqi and said, 'Junior, you seem so tired these days; let me give you a massage!'

Without waiting for Jiaqi's consent, he placed his large hand on Jiaqi's shoulder.

At first Jiaqi was tense, her shoulders stiffened, but under Cai Tou’s strong hands and moderate force, the tension in her shoulders gradually eased.

At first, Caitou's hands were properly massaging, but as time passed second by second, his hands gradually moved from her shoulders to her neck, sometimes secretly and gently touching Jiaqi's earlobes, then secretly embracing Jiaqi's waist. Jiaqi noticed that Caitou's breathing behind her was becoming increasingly heavy and panting. She couldn't help but be startled and was about to break free from Caitou's grasp when she suddenly felt dizzy. Worse still, her mind was fully conscious, but her limbs felt completely powerless; even lifting a hand seemed difficult, let alone breaking free from Caitou's hands and standing up. Jiaqi could only lean back on the chair in surprise.

Caitou noticed Jiaqi struggling and suddenly leaned over to lick her ear, his hands unceremoniously kneading her full, ample breasts. He said to Jiaqi, 'Junior, I think you've been too tense lately, so I added a little calming medicine to your coffee. In the next few hours, your muscles will relax completely, and you'll have no strength. Just relax and leave yourself to me! Let me help you relieve the pressure!' 'Oh... Senior, no... that's not okay... don't rub me there... wuwu... don't lick my ear... I'll feel it... no...'

Jiaqi struggled weakly.

"I've wanted to get with you for a long time. I'm not afraid to let you know: these past few days I've been putting my semen in your coffee for you to drink, so you've already eaten a lot of my essence."

You’re ready for me to conquer you tonight! Senior promises I’ll definitely satisfy you! ”

As he spoke, Caicai reached out and grabbed Jiaqi's tight T-shirt hem, slowly pulling it up in an attempt to remove Jiaqi's top. Jiaqi, powerless to resist, could only hug her chest and shake her head in resistance.

Caitou threatened, 'If you don't cooperate obediently, I'll tear your clothes later! Make you run back naked.'

Jiaqi was startled. She was truly afraid Cai Tou would tear her clothes apart, so she could only blush deeply and obediently straighten her arms, slowly raising them above her head, letting Cai Tou take off her top. Then Cai Tou, not at all sloppy, casually unfastened Jiaqi’s bra, and her huge, plump, yet firm breasts sprang out, bouncing in the silent research room. “Lie obediently on the table. I’m going to take off your pants. Hurry up!”

Caitou gave another order to Jiaqi.

Soon, Jiaqi was stripped completely naked and kneeling on the cold floor of the lab, too ashamed to look at Caotou sitting in the chair.

Caitou lifted Jiaqi's chin and asked, 'Junior, you have such a great figure, especially your beautiful, large breasts. Has your boyfriend ever had you do a titty fuck?'

Jiaqi blushed and said: “No... I don’t know how to do that?”

"Heh heh heh, no problem, then I'll teach you right now.

Haha, you really are a tender young girl.

"Come on, tie your hair up first."

Jiaqi paused, picked up the rubber band on the table, bit it in her mouth, gathered her loose hair with both hands at the back of her head, tied it into a ponytail, and then fastened the rubber band properly.

Caitou couldn't help but shout in his heart: 'What a sexy beauty, even the way she ties her hair is so sexy. It seems I must have a good feast later.'

Jiaqi first picked up a bottle of lubricant Cai Tou had given her, slowly poured it over her bare upper body, and then spread it evenly over herself. After that, Cai Tou guided Jiaqi to sandwich his penis in the cleavage between his girlfriend’s most proud twin peaks, while he slowly stroked it with his hand, occasionally moistening his lips and letting saliva drip onto the penis to enhance the friction.

"Oh oh oh... faster... a little faster... I'm about to cum... you're amazing... junior sister... you're really even better than a call girl..." Jiaqi's skin was soft and delicate, her innocent face combined with a devilish figure. After only a few minutes of breast-fucking, suddenly Cai Tou's flesh rod twitched, and a stream of thick semen shot onto Jiaqi's chest. At that moment Jiaqi quickened her movements, wanting to squeeze out all of Cai Tou's semen. The full load of thick semen was thus smeared all over Jiaqi's chest, shining with a lewd, mesmerizing glow under the light.

Jiaqi frowned and reached for the tissue, wanting to wipe away the semen covering her breasts and hands. Unexpectedly, Cai Tou stopped her and said: “Don’t wipe it off... just leave it... let it dry naturally... leave it for now, crawl over and help me blow me, you should know how to do that, right? Get my little brother hard, hurry up...” “Ooh ooh... senior... you... oh... you’re so hard, so thick... I... I got poked inside... so thick...”

On the laboratory floor lay Jiaqi's removed top and jeans. Caitou lay on his back using Jiaqi's clothes as a mattress, while Jiaqi straddled him from above, continuously twisting her serpentine waist up and down. Caitou thrust into Jiaqi from below, her tied ponytail already undone from the fucking, a waterfall of black hair flying with Caitou's up-and-down movements.

Meanwhile, Caicai's hands were not idle either, kneading the pair of ample breasts above, enjoying the youthful and sexy body of his junior.

"Junior schoolmate... does my flesh rod making you feel good...?" "Senior... I... I... the way you thrust is so... amazing... I'm almost unable to hold on..."

"Junior schoolmate, you... from now on, will you be my sex buddy? I'll thrust into you every day... okay?"

Caitou said shamelessly.

Who would have thought that since being played by Brother Chao, Jiaqi seems to have had a desire opened up. If she had been raped earlier, she would have resisted fiercely. Now, although Jiaqi couldn't resist due to being drugged, deep down she also somewhat expected to be treated roughly by a man, something even she couldn't explain.

"Good... good... senior... no... husband... I'm willing to be your fuck buddy... you can come fuck me anytime... oh oh oh... I'm going... no... I'm about to die... oh my..."

My girlfriend was about to climax, her mouth screaming wildly, her body shaking violently, reaching a wave of orgasm.

At this moment, Cai Tou was also at the end of his strength. After a fierce attack, he pushed my girlfriend away, grabbed her hair, and shoved his still-spurting cock into her mouth, then tightly held her head and continued thrusting until he shot every last drop into her mouth. Jia Qi closed her eyes and obediently swallowed all the semen.

After a simple tidying up, both returned to their normal state. Jiaqi's pretty face was flushed red, unsure how to face the senior who had just raped her. Instead, Cai Tou spoke first: 'Junior, you've worked hard too. I'll write the remaining report; you can go back first. Just remember to come ten minutes early tomorrow morning for the meeting to rehearse, okay?'

Jiaqi thought that was fine; better to go home early. Just then Cai Tou asked again: “Then should I buy some breakfast and bring it over tomorrow by the way?”

"Senior, you don't need to... I'll buy it myself."

Jiaqi Glared at Cai Tou for a Moment, Who Knows if This Pervert Will Again Put Something in His Breakfast Noodles for Himself.

"All right... then junior, be careful on your way back.

Don't forget our promise! 」

Caitou winked at Jiaqi, unclear whether the implied agreement referred to the report due the next day or the friends-with-benefits arrangement.

Jiaqi blushed and was about to leave when she suddenly heard Cai Tou let out a miserable cry, so she turned back and asked, “Senior, what’s wrong?”

Cai Tou’s face turned blue one moment and white the next. After a long while he slowly said: “I was just having a video conference with junior brothers in the lab... and then... then I forgot to turn off the video...” Jiaqi almost fainted, and hurriedly asked: “Then just now I... we were seen... from... from when did the video call start?”

Jiaqi’s face turned deathly pale; she was almost unable to stand, and even her voice was trembling:

"Senior... that video chat... exactly when did it start?"

Cai Yanliang's expression was also very grim. He quickly picked up his phone and glanced at it, remained silent for several seconds, then said in a low voice:

"Just now... when we were halfway through, my junior suddenly video-called to ask about the report. I answered it absentmindedly, and then... forgot to hang up."

Jiaqi only felt darkness swimming before her eyes; her legs went weak and she sat down directly in the chair. With both hands she clutched her face tightly, her voice so soft it was almost inaudible:

"Then... then they all saw it?"

Cai Yanliang did not answer immediately. He walked over, relocked the door of the research room, then approached Jiaqi, lowering his voice:

“I saw it. And... not just one person.”

Jiaqi’s body suddenly shuddered.

Cai Yanliang continued: "It seems like the junior over there was still recording. I just told him to delete it immediately and warned him not to spread it, or else I'll target his graduation progress. He was scared and should obey."

Jiaqi raised her head, her eyes red, her voice choked with tears:

“You… how could you be so careless… what am I supposed to do… if others find out…”

Cai Yanliang crouched down, looking at her at eye level, his tone suddenly softening:

"Junior schoolmate, don't be afraid. As long as he doesn't dare spread it around, no one will know. And besides..."

He paused, then lightly touched Jiaqi’s wrist, still marked with red traces:

“Even if someone really sees it, you can still say it was consensual between the two of us. Anyway… didn’t you just agree to be my fuck buddy?”

Jiaqi froze, her cheeks instantly burning again. She wanted to argue back, but realized that during her climax just now, she really had blurted out those words without thinking.

Seeing her silent, Cai Yanliang stood up, pulled her from the chair, his voice low but carrying an undeniable tone:

“For now, don’t think so much. The report isn’t finished yet; you should go wash your face first and get dressed. At tomorrow morning’s meeting, just act normal.”

Jiaqi lowered her head and looked at her messy clothes and the marks on her body that had not yet completely dried. She was silent for a long time. In the end, she only nodded slightly, her voice faint:

"...I understand."

She walked into the small washroom next to the research lab, turned on the faucet, and vigorously splashed cold water on her face. In the mirror, her eyes were red and swollen, her lips still a bit puffy, and faint marks were vaguely visible on her neck.

She leaned on the sink and whispered to herself:

"Jiaqi... what exactly are you doing..."

When she came out after washing her face, Cai Yanliang had already returned to his seat in front of the computer, pretending nothing had happened as he started revising the report. Seeing her come out, he said without looking up:

“Put your clothes on and go back first. Today’s matter… let’s just pretend it never happened. But junior, ”

He finally turned his head and looked straight at her:

“The promise between us still counts. Next time... let’s choose a safer place.”

Jiaqi did not answer. She only quickly tidied up her clothes, grabbed her bag, and left the research room almost as if fleeing.

As she stepped out of the building, the night breeze brushed against her face, making her slightly more sober. She looked down at her phone; her boyfriend had just sent her a message:

"Baby, are you done? Go back and rest early, don't overwork yourself."

Jiaqi stared at that line of text, her finger hovering on the screen for a long time, and in the end only replied:

"Mm, just finished. I'm going back."

She tucked her phone back into her bag and walked somewhat unsteadily toward the bus stop. Her mind kept replaying everything that had just happened—the taste of coffee, the feeling of losing control of her body, and the words 'Were we seen?'

And deeper down, something she herself was unwilling to acknowledge was slowly surfacing.

The story seemed to have just begun to deviate from its original course.

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