My first - Hyunlix

Felix is the only one of his friends that's still a virgin, he wants to sleep with someone but he hasn't found the right person yet. So he asks his best friend to help him out and he finds out a few things about himself that he didn't know. Luckily he has Hyunjin to guide him and show him how amazing sex can get to be so he can enjoy it with his future partner...or that's what he convinces himself it is for.

Or; Felix asks Hyunjin to take away his virginity and they fall in love but it's too scary to love your best friend, so they try to ignore it and move on.

Or; Innocent and soft Felix is not as innocent and soft as everyone thinks he is.