Okuno portrays a 17-year-old high school student Morimiya Taishi, whose first name means “ambition,” with dreams of becoming a wheelchair track and field athlete. Fukai Kyo is a former track and field athlete that now serves as his coach. Along with his father, who is an employee of a local factory, and his childhood friend, they are eager to begin training. One day, a handsome alien named Guu arrives on eath. He claims he escaped a genocide from one of Earth’s twin stars. Following Guu was a giant monster who attacked the protagonist’s house. Guu hands the protagonist a special transformation item, which envelops him, turning his entire body with a special wheelchair armor.