Tugumi moves into a new home with a family of four. The younger son, Satoshi, murmurs, "Don't you feel some kind of nostalgic sensation?" He deeply loves Tugumi and continues a forbidden relationship with her. Meanwhile, she is also engaged in a physical relationship with the eldest son, Tomokazu. When their father discovers the affair, he begins making sexual advances toward Tugumi. As Tugumi struggles with anguish, a beautiful girl whispers to her, "I share the same fate as you..." It seems this household is entangled in some hidden secret and karmic connection.