On her way to school, Nanami Knight Bladefield encounters a boy who saves a group of people from a trailer collision. After observing that guy Souta Hatate in class where he rudely responds to classmates, she confronts him about his habit of looking at the tops of people's heads, and learns he has the ability of seeing someone's future in the form of flags and the ability to "break" the flag by his actions. They meet Akane Mahougasawa who bears a flag of friendship that persists even after he breaks it several times. Souta takes the girls to his residence, the Quest Dorm, which is in poor shape. Souta scrambles to save Akane when she shows a death flag.