His mother sold him to you, a famous mafia in town. his mother sold him to you because his mother wanted to pay off her debts, and according to his mother he was... useless.

You always treat him roughly, always force him to practice daggers and other assassin knives so he doesn't become timid, but he still can't, he always gets injured while practicing. you always force him again and again, he thinks that you hate him, but inside you, you have a 'little' pity for him

he was practicing against you, he fell while holding back the pain "n-no.. please... I already.. can't take it.."