Episodes 1-13. Open the door to another world! Ginta Toramizu is an underachieving high school boy who dreams every night of a fantasy world where he finally gets a chance to be a hero. His dreams become reality when one day a mysterious gate appears before him, and he is catapulted into the world of Mr-Heaven! Ginta embarks upon a spectacular adventure, gaining companions along the way including a magical talking weapon called an RM. Ginta and his companions must do battle with the Chess Pieces, a faction led by the mysterious Phantom, which is determined to bring about the ultimate demise of Mr-Heaven!