An earnest and masculine husband, a beautiful and gentle wife, a handsome son, and a cute daughter – They say that this is an ideal family, but… The husband, Koichi, leaves his wife, Yukiko, in favor of a young girl. At the same time, the son persuades his sister to engage in carnal relations with him. This seemingly proper family is changed into “Donburi Kazoku(*)” by the visit of Koichi’s father.