they are brothers. hedid a DNA test he just didn't tell anyone. at the end.

that's just prove that everything can happen in a manga xD but i got a shock when i read, because i adore it, but i think two brother is wrong and disguisting

@ Chibichiin: 'though you have the right to believe whatever you wwant, some people view incest as being just as bad as homosextuality. Personally if it is a relationship between two concenting patners its fine, in my opinion.