Seiji FUKUSHI, Imou HARUKA
Akira Fukami was raised by Majima Yoshiki, the president of the Majima Group, who controls the Japanese underworld, since his father Mitsuo was killed by someone in his childhood.
He is now working as a janitor at high school as a secret bodyguard for Yui, Majima’s daughter. Fukami also has a secret face as an "assassin" trained by Majima.
Majima tells Nishimori, his subordinate, that he is withdrawing his business from Japan and moving it to Hong Kong, but Nishimori is rebellious.
Nishimori is repulsed and makes a certain plan taking advantage of Fukami and Majima's son, Honda. With that as a trigger, Fukami's hidden past is revealed, and Yui is now in danger...