Kenka Bancho Otome: Kanzenmuketsu no My Honey

For as long as shes been aware, the heroine, without a single relative, lived under care of the state. Both of her parents faces were unknown to her. In front of this heroine, a young boy appeared. The young boys name was "Hikaru". It appeared that he was the heroines twin brother, separated at birth. He had a proposal for the heroine.