Rie, a woman who has lost all her memories and wakes up in a hospital, begins living with Hiroki, a man who takes care of her and claims to be her fiancé. However, she begins to have flashbacks of a woman in black underwear...

Rie, a woman who has lost all her memories and wakes up in a hospital, begins living with Hiroki, a man who takes care of her and claims to be her fiancé. However, she begins to have flashbacks of a woman in black underwear...