Ofcourse he gets blackmailed by Do Hyeok. Why would Siwoo be sincere about DH. He is just doing his part by pleasing him that was the deal for the bar. Whereas DH wants him needs him but don't want to accept it. Who will break the barrier that needs to be seen.
ik, he was just doing it as part of the deal at the starting at least but after what happened with dohyeok and how he was literally panicking when taking off the nipple piercing, that lick was everything. also, when they were doing it, the way siwoo got so gentle with dohyeok, i'm getting literal butterflies.
the way siwoo kisses dohyeok tho- you can't tell me he doesn't care for dohyeok!!