Kyo is a cheerful boy living in the suburbs of Maihama city in Chiba. He’s a normal high school student whose life is busy with the swim team, friends, and romance. One day, Shizuno a mysterious transfer student guides him into another world, a world of giant robots and conflict. The more battles he survives, the more questions he finds, but Kyo must fight through his anguish and commit himself to combat to save himself and his friends.