Chubby, berated, and belittled by his younger co-workers, Rentaro, a 45-year-old man, yearns for the chance to relive his glory days from high school.

Mashiro has been the target of bullying ever since he started high school. He tries his best to deal with the physical and emotional torment, but his days turn even darker when his younger sister, the only family in his life, goes missing. Discovering tha