Nanami is a 26-year-old, single office worker. On her way home, after working late until the last train, she comes across a fight, she takes care of Sota, a university student who has been beaten up. However, this man is good-looking, but a womanizer. 'I don't mind if you use me as a pet.' A young college student and an office worker with no experience in romance, in a dangerous cohabitation love story!