Noa, the daughter of the Eikawa family, is an innocent girl who suddenly lost her memory one day. Because of that, she doesn't remember anything from before when she was a student. Beside her Noa is her maid, Shiori, as her caretaker. The two of the same age soon became friends, and they believed in each other until they overlapped their bodies, and finally Noa doted on her Shiori. However, there is a past that can never be erased by such two people. …Before Noa lost her memory, she had sexually assaulted Shiori….
