Honestly I don't care that Hyeok is using him. To me that's better that our fellow grooming creep. I mean seriously the more they went into detail about the backstory the more I wanted to peel my skin off. ┑( ̄Д  ̄)┍However, I do think they're both weird, not equally weird, but weird. Because what do you mean you don't mind getting freaky with your sibling in the room. Much less be in the tunnel with your sibling. Like isn't it funny that he was saying he didn't want to be tunnel buddies with his brother. Just to turn around and literally be in the tunnel with his brother. Me personally I don't care how close we are that's weird, and they're not even close so it's extra weird. (〜 ̄△ ̄)〜
But we all know Hyeon should have backed down because his brother doesn't believe in bluffing. I mean bro really doesn't beat around the bush like he said, and he doesn't mind letting you know he has a problem. He also doesn't care enough to try and hide anything from hyeon, so why did he think he'd leave. ╥﹏╥