Renji is a young boy who dreams of becoming a powerful and cool Yakuza. He spends his youth preparing for this role, only to find himself feeling empty and hollow once he finally achieves his goal.

As he reaches the age of 19, he realizes that he has only just begun to experience puberty, and his emotions and desires suddenly become more intense and confusing. One day, he meets a girl who captivates his heart, and for the first time ever, he feels a strange and unfamiliar feeling.