Tenryuu Taiga have tremendous powers and are bored with the regular world.One day there is flash light surrounded him ,when he open his eye,He are stunned to see the scenery around him change to a world he had never encountered before. He have been summoned by Selene Bael to help her to regain some of her family's glory back.One of Selene's aims is to win the Rating Game which will give the winner the title, EMPEROR. In order to participate in the Games, she needs to have a familiar according with a chees piece and get good results in rating games arranged by the school she attend.(BASED ON MONDAIJI TACHI GA ISEKAI KARA KURU SOUDESU YO)