At 29, Masakazu Sakaima slogs through his job at a food company and his performance lands him a transfer. He is irked by his laid-back colleague's attitude, but things take a turn when he meets Kazutoyo Yamaji through a Rental Uncle service.

Masakazu panics when he feels Yamagishi might have attempted suicide. Yamagishi is alive, but he's done with the company and decides to quit, alleging harassment.

Masakazu finds himself in hot water with a looming lawsuit after he refuses to own up to accusations of workplace harassment. Trainee teacher Sakura approaches Yamaji with a complaint about bullying in his class.

Trainee teacher Sakura's boyfriend causes a stir by bursting into school and announcing to everyone that Yamaji is still a virgin. Maribu juggles his new role as manager of a bustling girls' bar and Yamaji and Miyashita find a new adventure.

Masakazu worries about his sister after he finds out she is working at Maribu's girls' bar and ropes Aso into checking out the bar. Masakazu is shocked to hear that there is an opening for a Sendai branch manager.

Masakazu is stunned to discover that Maribu is dating his sister, despite being married with a child. He heads over to confront Maribu. Yamaji's dedication to helping Daigo, a child with a learning disability, brings him closer to the boy's mother.