Satou and Hime have been best friends for as long as he can remember. But when Hime shares her plans to return to her home planet for her wedding, Satou decides he has to go with her and stop the ceremony. To his surprise, he succeeds in his mission and ends up getting engaged to Hime with a kiss. But what he doesn't know is that the groom-to-be is actually destined to become a superhero with immense strength and the responsibility of saving the world. Can Satou handle this daunting task as a lone high school student, or is he ready to take on the challenge?