"Episode 1"

Yui arrives in the mysterious house and meets the six brothers who are actually vampires but none of them knew about her arrival except Shu who explains that he received a call the other day from a man and he told him to keep her safe and not to kill her. Soon, Yui learns that she is the prospective bride and she tries to run but ends up in an abandoned room where she finds her dad's diary and discovers that she is adopted. The episode ends with Yui yelling for help as she was cornered by the six brothers.