In a world where every boy and girl has a special power called Iris, Tooru who, as a result of not having any kind of special power from a young age, lives by his motto, "low exposure"—to live without standing out. But his peaceful school life changes when he receives a certain "confession" from the school's most popular girl, Koyuki. His motto begins to shake!! The school fantasy that shakes the heart begins with their meeting.