Daikichi, a 30-year-old bachelor, encounters Rin, a 6-year-old girl he doesn’t know, at his grandfather’s funeral. Daikichi is flabbergasted when he learns that she is actually the illegitimate child of his grandfather. The other relatives pretend to have a discussion over who will get custody of Rin, all the while trying to fob her off on each other. Unable to let this pass, Daikichi impulsively declares that he will adopt Rin. Daikichi has a strong sense of justice, but he’s a blunderer, while Rin, though a little girl, has a strong mind. And so their life together begins, a road that is sure to be bumpy and will require cooperation from both of them. Can Daikichi handle both child-raising and his work? And will the single Daikichi find a partner to make his new family complete?