Tetsu(black haired brother) is adopted and Retsu(the other one) is the half brother related through their father. Tetsu's real father was their uncle and his mistress and Retsu was the son of their father with his uncle's wife. Long story short, technically not incest but they're cousins..
Ahhh... Okay thank you :D
Lol omg i did the same i was like fuck this skipping to the end
Haha yes XD
One the guys changed throughout the manga and ony she stayed pretty much the same/// BUT what I rally want to know is- Who are the isblings and hwo aren't? I got bored half way through and skipped right to the end and i DON'T know if this ended in incest or what.