The thing is Soenghyun Likes him and wants to be with him but he know that Joengin doesn't see him as a candidate lover, but just a younger pathetic roommate maybe, and that's why he's mad.
He is poor, his father died and his mother left him.
No one takes him seriously,
On the other hand, Joengin is rich and arrogant, full of pride, have so many friends.
Joengin's behaviour towards Soenghyun was kind of reckless and kind of humiliating somehow because he kept giving him used or new stuffs which could kind of hurt his pride cause Joengin didn't even used that detergent he bought.
Check my stories on WP, Tapas, Inkitt: @Minooiii
Obsession, Reborn, My second chance (BL)
My Fav one from a friend on Tapas, Inkitt: @Zeonksus