
It is sad what happened to Yoojin in his childhood but it doesn't mean what he is doing with Jihoon is justified and he really need a psychiatric.
And to be honest, I don't even care about him. I just care about Jihoon.

It's quite hard to deal with traumas especially when the psychological effect is family related. As a human we all first trust the kinship that we knew since we were born and that amount of trauma is huge for him. Stop with the nonsense that everyone should be "i experienced this so I'll make sure others don't" because that is unrealistic. Everyone has a different reaction towards their trauma and neglecting those feelings is worst than the negative attitude that they have right now. Defense mechanism is a normal reaction of the brain and that mechanism acts differently per person. Just sharing. I'm just pasting this again but just to let you know, I neither justify nor condone the fact that he has a negative attitude towards his trauma. But the thing is how are you supposed to tell a person what he's doing is wrong when in his perspective it is the right thing to do? See I just wanna make it clear here that y'all should stop the stigma that everyone can be fine after a psychological trauma, that's honestly toxic.

I agree to this. And the trauma was caused in his childhood by the supposedly “closest” people in the world, the people who you are supposed to be able to trust at all times so the damage is even bigger. What if someone came up to you and told you this exact story and what they have been doing up until now? Would you say “oh no you’re wrong and by the way you suck”? No you would sympathize with them and tell them what they are doing is wrong but it’s not their fault and they can fix that. You can’t tell them it’s wrong unless you show them cause up until now all they’ve known has been this cruel and hideous world so how can they change? (And by the way no harm to the first person who left a comment I was just getting so mad with everyone saying he should’ve sucked it up and acted like a grown up (which again was very infuriating because when all this happened he was just a kid) and I was very moved by the person who replied, respect to you friend)

I was just saying it from a third person perspective. It is really sad what Yoojin had gone through and it impact him very negatively and I understand that (that is way I mentioned he needs a psychiatric).
But in case if he do something wrong to Jihoon or anybody(not saying he will do it), can his actions be justified because of the trauma?
Anyway it is a quite heavy topic and I definitely not the best person for it.

Does anyone know the name of the manga(black and white) in the end of the ch1 ??

I'm pretty sure it's
https://www.mangago.zone/read-manga/boy_boy_idol_collection/
on chapter 5
Is it going to be threesome? I will wait for couple more chapters before I read it.