Mahiro is suddenly dumped by the man she loves. One day, she uses a duplicate key to break into her ex-boyfriend's house. I felt a strong ecstasy well up when I was hiding in the closet and observing my ex-boyfriend's life. Since then, Mahiro's behavior has become radical. Like unilaterally taking an ex-boyfriend who has mixed drugs and fell asleep. The whole story of a crazy love affair that repeats marking with tides and saliva.