Physical chemistry??

No science lab was harmed in the process

“Chaehyun! What are you doing! Stop please we are in the middle of our practical!”, clearly trying to do dodge Chaehyun sneaky smooth hands from reaching a certain area on your pants.

“Come on Oppa, this lesson is so boring and lets be honest with you around we will be able to ace this practical assessment even with your eyes close since you are all rounded scholar with full marks for every subject. So why not let’s have some fun and improve our chemistry during this chemistry lesson in this lab especially with your hard and thick rod down there. " Hearing her reply and seeing that smirk on her started to have some effect on you especially when you see her handling all the different sizes of the burette available on the desk.

While handling the burettes, Chaehyun pulled a quick one grab your cock, causing you to let out a soft but low groan and she brought her lips right next to your ear whispered, “Omo Oppa, getting hard for me already eh, look at these burettes none of them are as thick as your cock and certainly the volume of cum in you exceed the capacity of all apparatus here since it feel so full.” With that both of you looked towards the table seeing all the apparatus there and Chaehyun look towards with a wicked smile, seeing that smile you certainly know this is going to have combination of all the sciences involved.

Of course you don’t want to show any form of weakness, you immediately pull Chaehyun onto your lap lowly whispered, “Chaehyun you are playing a very dangerous game right now, keep pushing it, you will be in for a lesson you will never forget.” Hearing your words Chaehyun gave you a smug look replying “Ooh, please punish me sir let me learnt my lesson.” With that you shove your left hand into her skirt pass her panties and took a swipe at her pussy, feeling the wetness coming out of it you shove two fingers in a continuous motion. You growled into Chaehyun ear, “You little slut getting tight and wet while doing practical with me, do you want daddy to spicy this practical up for you?”

“Please daddy please punish this slut for being so horny during lesson.” Chaehyun whimpered. With that you took the deflated pipette filler and insert into Chaehyun plump ass and whisper to her, “Baby girl be good and tight for me until the end of class and don’t move too much as the more you move the faster the filler will inflate and if you cum before the end of class, you will not be able to cum for a long while.”. Due to having the pipette filler insider her pussy, Chaehyun let out a small moan every time she made any movement.

After a long time finally school has ended, you were waiting in the exact lab that you were in just a few hours ago doing your chemistry practical, but this time you are waiting for Chaehyun for another kind of practical. Upon hearing the knock on the door, you peek out seeing Chaehyun outside you immediately pulled her in and locked the door. Once the door was locked, you lunge at her and started to kiss her hungry, in the kiss Chaehyun also don’t back down to you and return with same ferocity with the two of you fighting for dominance.

While kissing you snuck a hand down Chaehyun’s uniform roaming around her voluptuous body eventually landing onto her well developed breast. As if treating her breast as stress ball, you gave it a hard squeeze earning a loud moan from Chaehyun and also igniting a fury of lust between the two of you as you guys starts to strip each other of their clothing. Looking into Chaehyun eyes you can see the lust that is starting to form in her as if it is salt crystals crystallising on a petri dish, you immediately kneel down and started to eat her out. With your tongue licking up her clit and pushing two fingers in, it earned you loud moans from Chaehyun where is she is telling to keep going and to “not stop” eventually after a while with a loud squeal she shouted , “I’m cumming Daddy!!” and to nobody surprise it was a sweet release.

Chaehyun with all her strength push you to the table and hop on to with your hands on her lush thighs, you thrust into her at full speed and power. “Mmmh fuck me more… harder… daddy don’t stop!!” this was all Chaehyun could say while you were thrusting into her, in order to find support she held onto the retort stand that was it could keep her grounded. “Ahh, so big!! So thick!! I’m cumming!! Daddy fuck Chaehyun more fuck me!” under your relentless pounding Chaehyun reached her peak and let go a large amount of squirt even that you continued pounding determined to reach yours too. Once you felt Chaehyun tightness clench over your cock, you also gave in to the satisfaction of release and came into her warm pussy. After cumming you pulled out seeing the mixture of you and Chaehyun leaking down Chaehyun thighs you took the beaker on the table collected it. Chaehyun seeing what you were doing gave you a look of judgement but it also a look of lust and said “daddy look at the volume I think we will be needing more samples for more accurate results.” Hearing her, you became hard again and the process repeats itself as any good scientist would know in order to get accurate results multiple experiments have to done during result collection by the end of it both of you will fill up the beaker of the substance produce by the two of us just like the practical you did earlier on titration between acid and alkaline.