Responses
He doesn't cheat, tbh, he's not even that interested in sex until he met MC, that's why at 1st he thought he's addicted to MC's asshole (he does) but he just ended up realizing he's addicted to MC overall
The reason why he's even in that place despite having high position and money already is because he thinks that place perfectly capture who he is, a low life, a thug

90% of the story doesn't go anywhere or expand the plot. Especially when
the ML purposely trap MC in that shit hole without his knowledge (he didn't put him there in the 1st place but he makes sure MC can't escape it despite already paying back the debts for him)
Then he traps MC in a different place so the rest of the story (10% of it) is basically him in ML's place waiting for him to come back home then have sex
Barely even let MC meets up w his grandma, they mostly only talk through phone calls