It was 5:00 pm and you had just gotten home from school. You had a test the next day so you asked Yoosung if he could help you study. He said that he would be over it half an hour. "Perfect, just enough time to get ready!" You thought to yourself. When Yoosung asked what subject it was you didn't tell him because you wanted to keep it a secret. You went upstairs and chose something that was sexy yet didn't look like you put too much effort into it, you then threw your hair up in a messy bun and went back downstairs. You went through your bag and got out all of the necessary text books and papers and plopped them onto the coffee table you your sofa. A little while later you heard a knock at the door and you excitedly ran to it and opened it to see your boyfriend. "Hey y/n!!" "Hi Yoosung!" "So what did you want me to help you with y/n?" "Oh.., I'll tell you in a sec, you can just sit down for now" he walked over to the sofa and sat on the side closest to the kitchen as he watched you get glasses of water for the two of you. You could feel him looking at your figure as you were filling up the glasses. " well, this should be easy" you thought to yourself. However out of excitement that your plan was going well you turned a bit too quickly and spilled some of the water on your shirt causing Yoosung to stare more intensely at your cleavage. Even though that wasn't part of the plan it still worked in your favour so you decided to go along with it. Yoosung was still staring at you " Yoosung, what are you looking at?" You ask in a cheery tone. The boy instantly turned red and looked away. "N-nothing... sorry" you giggled. You sat beside him and took out one of the text books and opened it on the correct page and placed it on his lap. "Sex Ed..." he read aloud and then blushed slightly. " you should be good at this right, you are studying medicine, this must be included." He was a year older than you and already started his course work so you knew that he was quite good at sciency stuff. "Um.. yeah I could help you with this. It's pretty simple" he said as he smirked at you. " ok... so explain everything to me!" You said cheekily. He started to explain the basics and even though you enjoyed listening to him talk and explain you decided to stop him. " you know... this is a little boring..." you said while staring into his eyes. "Is there any way I could make it more fun?" He said with a look of genuine helpfulness. " maybe... you could... show me?" You said while blushing. He looked at you surprised but then quickly leaned forward to kiss your lips. "Of course I can" he said in a lustful voice. He began kissing you harder and more passionately. He then licked your bottom lip and you opened your mouth slightly to let him explore your wet cavern. He then started to kiss down from your jaw till your chest. You let out a small moan and you felt him smirk at the sound. He then started to suck at that spot causing you to moan even more and louder. He then stopped to remove your shirt and bra leaving you half naked and allowed you to take off his shirt too. He then started to suck on your left breast as he played with the right. You bit your lip to try to keep the sounds in but the more you tried the harder he sucked ending with you moaning loudly. He switched to your right breast and started playing with your left repeating the same treatment. He kissed down from your ribs till the very top of your shorts . He felt you get a shiver and then licked you from the waist of your shorts till your belly button. You let out a small squeak to the pleasure. He then unbuttoned your shorts and pulled them down leaving you in your panties. He bit his lip at the sight of how wet you were and then proceeded to pull down his own trousers. You could see that a tent has formed in his boxers and this turned you on even more making you involuntary squirm and moan slightly. He smirked at your reaction and then started to massage you through the fabric. This made you squirm and moan even more. At this point you had given up completely about keeping in your sounds and let them all out. He grabbed the edge of your underwear and pull it away from your body and let go, causing you to squeak once again at the elastic hitting your skin. You looked at him with a face that said ' please stop teasing me'. He instantly understood and pulled down your underwear, along with his. He lined himself up with your entrance and kissed you deeply before entering. Your eyes filled with tears as you adjusted to his size. He looked you in the eyes with concerned eyes as he comforted you. " don't worry, the pain will leave soon." As the pain faded away you moved your hips slightly to tell him that he could move. You felt him pull out and then line up with your entrance again. This time when he entered he went in with his whole length making you gasp. He moved slowly at first but began to speed up and the faster he went the more he would hit your walls making you moan and orgasm like crazy. He began to move at inhuman speeds as he got closer to his climax. You heard him grunt slightly before he pulled out and came all over your stomach. He then licked you clean starting from your entrance all the way to the bottom sides of your breasts. "Now, you better get 100% in that test since I taught you so well" he smiled at you as he said it and you smiled back. The next day you took the test and as predicted you got 100%
