Raised as a young lady, Yumemi Teru. Attending a prestigious university where many sons of famous families are enrolled, she has a boyfriend and a smooth sailing life. One day, tragedy befalls her. On the day her parents are away on a trip, she invites her boyfriend over to spend time alone together, and while cooking at home, the intercom rings. Thinking it's her long-awaited boyfriend, she hurries to open the door, only to find unfamiliar men there...