I'm gonna tell you the plot first, i got this idea from their song stuck. I read the translation of stuck and it's about obsession with a girl that he's stuck in his fantasy with this girl. He's blind that he can't see anyone but only the girl he truely loves but in this chapter i'll make a little twist because the character are shownu and kihyun b'coz it's showki oneshot right? Haha

So okay, The plot is kihyun is shownu's bestfriend and kihyun did not know that shownu has a crush on him since when they little, shownu always get bully because of his looks when he was a kid and kihyun who is a beautiful and kind kid help him and starts to protect him but days, weeks, month, years had passed and shownu is getting more y. Kihyun ofcourse didn't got ugly but he got more pretty and it made shownu fell in love with him. This was the obsession began. 

[ Lmao sorry for grammatical errors. ]