A retired bodyguard pretends to be a novice when his humble security company decides to implement a new bodyguard division.

KICKS, the private security company, where Akira Shimazaki works is sold to a large company. New leadership at KICKS is laser-focused on making a profit, leaving Shimazaki unhappy. To stay true to his belief of protecting the weak, he quits his job at the private security company. Akira Shimazaki begins to work for himself as a private bodyguard.