I'm so confused. The brothers look the same so I know it will be hard to keep them apart. Also I don't get the flashback because I know the black haired guy likes the brother and said his name when the younger friend was with him. But they didn't specify what they were doing because if they were doing IT it would be odd because dark haired boy doesn't like younger brother. Also they were wearing clothes so I don't think they were doing something 18+. But in what situation did he say the older brothers name?!??!?
