It is the first day at a new high school for Yui but she finds it strange that the high school is at night. On their way to school she notices that all the brothers are different from each other and don't seems to get along. Later at school Ayato forces himself on Yui and sucks her blood and does not stop until Reiji comes and tells him to take his activities to his private room. Later, Ayato throws Yui in the swimming pool and orders her to say that he is great but Yui can't swim and asks for help. Ayato than has a flashback of his childhood and after that he jumps in pool to save Yui. He kisses Yui underwater to wake her up and suck her blood; Yui begs him to stop and he stops, telling her he will continue later. At the end of episode Yui goes back to the abandoned room to see her dad's diary but finds it blank and is confused by this.