I think I have a hint of why because I accidentally read a spoiler about him, you'll find out eventually!
can you spoil me?
just a guess..I think he might be a detective or something.. because he looks like one of the detectives talking about the case in earlier chapters.
Okay I'll spoil it- everyone else, read at your own risk...
(=・ω・=)
He's Kister's twin brother— I'm pretty sure, and he's the real killer, not Kister.
Idk about anyone else but Jerome’s new bf is really creepy, I mean the guy stole Jonathan’s phone when they first met and now he’s dating one of his friends.....I think Jerome is right in a way, the guy does have some sort of thing for Jonathan