Meet Yukinari Sasaki, an average high school boy who has extreme girl-phobia - and an allergic reaction when girls touch him. One day, he befriends an alien named Miharu, who comes from a planet that houses only women. Remarkably, Yukinari is able to touch Miharu without breaking into a sweat. Accompanied by Miharu, he returns to his own world: but shortly thereafter, other girls follow them...and his life turns into one big mess!