Responses
I dont think he's ganna be selfish sejin want to cut ties with ido but the problem is they are bonded the only sulution is to kill your partner to end the bond relationship yes sejin will troumatize if ido kill himself but ido will do anything for sejin even thought killing himself with the same gun the sejin use kill himself i think that will be the climax of this story

No but let's say Kwon Ido kills himself, isn't it super selfish again? Like doesn't he know how would it affect Sejin, he might think sejins life would be better but he sure knows it'd traumatize poor guy even more. Like if he kills himself he's not redeemable anymore,bc thought killing himself he would free himself from suffering and would burden Sejin even more. He just should keep living and suffering on how own and hope Sejin forgives him at some point