A live-action adaptation of the comic of the same name by Chika Tomisawa, depicting the comical daily life of a yakuza who suddenly finds himself reborn as a baby! Harada is a man living in the world of the yakuza. One day, whilst on his way to avenge his boss, he encounters a young couple in labour. Unable to turn a blind eye, he approaches them, but loses his balance and falls. When he came to, he had, to his astonishment, been reborn as a baby. What fate awaits Harada—now known as Hoshio (Hoccho-kun)—as he finds himself resigned to life as a baby…?