I think its probably because of the sunbae family.. maybe they are super catholic and won't accept any homophobic ideals.. probably because of that the sunbae is forcing himself to live a normal life with a women. But he seriously need to get the hell out of mc life.. we don't care if you have family problem, you hurt our baby and you don’t have the fucking guts to go against your family and now what!! He's aiming for mc when he's already set for marriage and moreover mc already told him he has a bf
even so he still shitty for using that woman as a beard. i just dont like how in bl stories women always get the short end of the stick. like there just there as a plot device. she probably thinks he genuinely likes her when in reality he’s only using her. and yeah he needs to stay away from mc. take a hint dude he doesn’t want u!

im sorry but the sunbae is a horrible human being. why would he play with that woman’s feeling. seriously for what? to make mc jealous? mc doesn’t even give a damn about him anymore so it’s pointless. sunbae is clearly in love with mc and 100% doesn’t give a fuck about her and is only using her. tsk tsk the only way his character can be redeemed for me is if it turns out their just faking their relationship and lady is in kahoots with sunbae. that’s it . otherwise sunbae can fuck off