Daichi’s father was an astronaut – until he was killed in a launch accident. Now, he’s approaching the summer break of his 2nd year in high school, and to be frank, he’s pretty much lost interest in his studies. Teachers suggesting he might want to follow his father’s career choice isn’t helping, either. An article on the news catches his attention, though – a circular rainbow in the sky, bringing back childhood memories of a boy who could generate such things from his hand. Unbeknownst to him, it’s the Albion Rainbow – something that the members of bad-guy organisation Kil-T-Gang are pleased to see.