Yamada Ryu é um péssimo aluno e tem fama de ser um deliquente. Um dia, ele se envolve em um misterioso acidente com a estudante de honra Shiraishi Urara. Os dois desmaiam e acordam um no corpo do outro.

Follows the life of Eijun Sawamura, a gifted baseball player who have his own extraordinary pitcher's talent. His goal is one, to become the ace of Seidou High School.

In year 71 of a new age where most humans live in space, two powers - Dorssia Military Pact and ARUS - vie for control. Neutral JIOR nation's student Haruto Tokishima lived peacefully until Dorssia's invasion of his Module 77 home.