fuck you! if they weren't blood related, the point of the manga would be lost: it doesn't matter, love is love. go back to your cave, with your outdated beliefs
you're Absolutely right! this person had no right to come after you simply for voicing you opinion whoever they are THEY can fuck off. Btw i totally agree with you like just imagining being in a relationship with one of my brothers really grosses me out which is why i can almost never get into incest (its usually better with yaoi because they cant have horribly disabled mutated children) but still... i feel ya
man its sucks whatever it is...
i mean why dont the author just make them not blood related just like anymanga i read jezzz Σ(  ̄□ ̄||)