sanemi was the oldest of 7 siblings. His father was a cruel, abusive man but his siblings didn't know that. He tried his hardest to hide it from his siblings especially his second oldest brother, Genya

sanemis father usually took it out on him when it was night as if he was just a punching bag

11 pm : sanemi and genyas shared room

Genya: ..sanemi. why do you go downstairs late every night?