The twins were expecting a secret that they had yet to find out but it wasn't. And though it was something they had a hint about, hearing Dongwoo speak about it and crying, their hearts ached for him.
Dongwoo's words were like thus,
"I get scared... When I'm about to have sex." He said and sniffed. "I have this trauma from back then, when your father tried to force himself on me, so each time I get to the point of having sex with my last lovers, I would freeze up and start shaking in fear. I just couldn't go past that stage and..." His tears started flowing down again.
He cried.
"That's why they all ended up hating me. My inability to give them what they wanted as a partner was the reason they said harsh things and ended up hating me. They did their best and put up with me for a few days and some a few days but I had nothing to offer and was no good. I... I'm broken."