Noya, the young lady of the Eikawa family, suddenly lost her memory one day and became an innocent girl. Because of this, she doesn't remember anything from before her student days. By Noya's side is Shiori, a maid who takes care of her. The two, being the same age, quickly become close friends and come to trust each other enough to share their bodies, ultimately leading Noya to become infatuated with Shiori. However, the two have an irredeemable past... Before losing her memory, Noya had sexually assaulted Shiori...
