Over a year after her mother's passing, Shouji becomes concerned about his father and suggests to his wife Iroha, "Why don't we live together with my father?" Happily agreeing to the idea, Iroha begins living with her father-in-law. However, things take a turn when the lustful stepfather starts setting his sights on Iroha's body, sparking unforeseen conflicts. Life under the same roof with her stepfather proves far more difficult than she ever imagined.