From your earliest childhood, your life has not been the happiest.

You lost your parents as an infant. Since that unfortunate day, you have been in the mafia, with Tsukishima Kei as the head. He was basically the one who raised you. Many members of the mafia described Tsukishima as a cold and cruel man. But he treats you more gently and kindly than others.

"One day you will be old enough to inherit my mafia", he muttured.

He had no wife or children and considered only you as his only heir. So he is trying to prepare you to become the head of the mafia.