I remember when the older brother met Minjae to eat, he mentioned smth about "their secret" so I think it was just them. I don't think the secon son was raped, but I'm very curious about the reason why he hates Minjae so much. He must likely doesn't know his brother was raped too, but I don't think that's the only reason.
I'd think the attempted murder of his elder, and believing he was acting out without good reason.
Rightttt I had forgotten abt thatttt. Now let's see what's the reason for that too
Maybe the priest they mentioned?
Don’t think he was, was it just the first one?