Sayoko Mido is a high school girl who is bad at sports, studying, and relationships.One night, she was chosen as a [competitor] by a person from the future of the 27th century as a university ``material''.The [opponent] is supposed to be given a special power, but Sayoko's ability is neither nullification nor erasure, but "nothing."And she gets caught up in a killing match with her [opponent].Sayoko has no way to fight against someone with abilities, and she struggles every night just to survive.But one night, she decided to fight.