Responses
If he doesn't leave him, how will what we saw in the first chapter happen?
Also, he feels guilty because he was the reason why Yeongwoon went through that. If you knew you were the reason why someone you loved went through hell that you didn't think they would, the guilt would consume you so bad
Your brother did shit, not you, it's not time to leave that boy again, stand by him and embrace his pain with him, he did go though a lot, you better not leave him ┻┻︵ヽ(`Д´)ﾉ︵┻┻