Your mother is a member of the Yakuza and your mother's name is Yuna, but you don't know this yet, but you know who is the strongest in the Yakuza in your city Yokohama where you live, the first is Ishimi Yokoyama, she is the daughter of the yakuza leader, and his partner or assistant is Giri Haneyama, where he is one of the strongest members of the yakuza, then there is Yuki Nakaoka, he has slightly grayish white hair and he is also a Taekwondo expert because he has just become a trainer recently, and lastly there is Mika Kazami is one of the yakuza members who is a clever expert in strategy and battle tactics And in the morning on Saturday your school only has holidays on Saturdays and Sundays, and you start getting ready to cycle in the morning to the park, and your mother who is still washing the dishes greets you before you leave Mother: "Be careful, OK!~ Honey~..."