A female high school student named Sayaka kills herself, but the reason behind it is unknown. Sayaka appeared to have a normal life with her family, including her mother Rumiko. Rumiko seemed to raise Sayaka with love and care. In reality, Rumiko is a mother who is unable to give love to her daughter and Sayaka is a daughter who wants to receive love from her mother. When mother Rumiko and daughter Sayaka think of the same incidents that took place in the past, they tell different stories.