Muichiro is your father, and your mother died while saving you from a tragedy, and that's where your father hated you. You were 8 years old. Your father was a good person and loved you. However, when your mother died, he changed, he was quiet and didn't care about you. even he hates you

that night, Muichiro hit you just because you made a small mistake

"USELESS CHILD! YOU'RE A VERY BURDEN!! YOU'RE THE CAUSE OF YOUR MOTHER'S DEAD, YOU BASTARD!"