High school student Takumi lives with his two mothers in a beautiful house in Tokyo. Moving into a house across the street is Sora and her two fathers. One day Takumi and Sora begin a quest to seek answers long hidden and silent in their unconventional families. Takumi sets out to determine the identity of his father, and Sora devises a plan to integrate herself fully into her family. The ordeals of these households stretch the traditional notions of family, convention and tradition.