Everyone in First Year Junior High School little by little are becoming adults. However for Akane Mizutani, her innocence still remains. One day, she meets Tsukino Tooru, who has rumors calling him weird surrounding him.

With their encounter, Mizutani finds out Tsukino has psychic powers. The two then promise to meet at the schoolyard every Monday night. Such story depicts the two's relationship and encounters with each other.