Three years after losing his beloved wife, a husband continues to live each day with deep emotional scars. Meanwhile, the sons, still unable to forget their late mother, walk their own paths while carrying their own pain. Into this fractured family comes Yuriko, who joins as the new wife and stepmother, gradually taking on the role of a mother while forming new bonds with both the husband and his sons. As these four lives intertwine, desire and love become entangled, giving rise to a lewd and intense eroticism. Beyond the boundaries of family, complex and profound relationships ignite a passionate, suffocating heat.