A human being sucked by a vampire will die the next day." Yuuto was hired by the mansion to be regarded as a "sacrifice" of Vapia, but he survived and unfolded a chakkari H. He is the chief maid, sister, and Marie. It's not a coincidence. The "power" hidden in Yuto invites him to a paradise of the moment. The power of the unmistakable king. The development around Yuto involved him and his surroundings just below the sudden turn, and finally ... Which is Yuto or Serena tomorrow !?