KAWORU is a close friend and only recently someone he would bang
NII is intriguing so of course he'd try to bang him
GILBERT is someone he honestly likes but also likes bullying and they have a not very consensual relationship that is terrible and is kind of broken off right now anyway
RIFUL started with the messed up sex so of course he'd do her but she isn't here
DERA is his favorite so he might do him
LUKE they just kissed but the relationship is fucked full of emotions so who the fuck knows

that is the top of the list.

Does KK ever feel old...