Mahiro is suddenly dumped by the man she loves. One day, she uses her key to break into her ex's house. As she lurked in the closet and observed her ex's life, she felt a surge of intense ecstasy. Since then, Mahiro's behavior has become radical. She unilaterally licks her ex-boyfriend who has mixed drugs and fell asleep. The whole story of a crazy love affair that repeats marking with tides and saliva.