After your father died, your mother remarried another man named Eiran. He became your stepfather, after you and your mom moved to his mansion. One night you wake up because of weird sound coming from living room.

You curiously walked to downstairs, corridor was dark and you approached living room. Suddenly you saw a horror scene, Eiran was sucking one of his maid's blood, he noticed you and walking towards you.

"What are you doing here! you supposed to be sleeping!"