Captivated (FREE)

It all began when Jin, his little sprout, aroused the manliness in him and succeeded in getting his attention. The slight interest he felt soon turned obsessive and possessive that it was now too impossible to pull himself away from him. 
Hiro never knew his jealousy measured the way he cared towards him, neither does this little man under him knew.
It was now too late for Jin to realize. He kept his head down, unable to stare at his eyes. 
Two thin arms wrap around his muscular shoulders. The sound of heavy breaths and the bed creaking against the wall and floor fill the whole room, but his soft moans plunged his ears, causing him to go berserk. He surrendered and let loose of his control. Kai Hiroshima Woo could only bury his head to his little sprout’s pale shoulders as his speed increases. 
Jin knew the man was upset, but he never knew he was this upset... 
Jin, who was pinned under a strong embrace whimpered, his frail and thin body trembled in shriek pleasure and pain he’s not familiar with. The nonstop pounding as his heated body slammed against Hiro’s rock-hard ones. It both turned Jin’s head blank. He was drowning, unable to resurface back by the pleasure he didn’t want to admit himself.
How did he end up like this? They were supposed to do a school project.
But…
He never knew of this before. The blinding pleasure and stimulation he felt were unexplainable. He never knew he was capable of feeling this sensation.
Due to extreme embarrassment, Jin covered his small feline face with his bare hands. His pale white skin turns red as he shrinks more to the sheets behind him when a pair of wet and warm lips presses against his forehead. 
Hiro's gentle kisses trace down to Jin’s hands that’s covering his face. 
The last thing Jin felt was Hiro’s warm tongue lapping against the back of his hand before everything went into bliss.
How did they end up like this?