I think Cheng ex-crush
its his ex before he went to jail. they broke up when he went there and is trying to get back to him because he needs protection from other groups of their gang. cuz he is one of the important ppl and a lot are trying to get rid of him. though others cant touch cheng that is why he is trying to get back to him.
BUT don't worry our ML is very loyal though MC just have to chill and calm his womb down.
Nooo he's not his ex. That guy just spread a rumour that they were lovers and QC found it bothersome to refute it. He only sees him as his younger brother
hmmm idk... when that dude tries to kiss him and cheng said that they are no longer a thing no more,,,, hmmm idkk
Spoiler but may i know who the heck was the dude with cheng cheng?Just wanna know cause i might throw fists (=・ω・=)