A young man, Isogai, throws away the answer sheet from the top of the pedestrian bridge. Is what I've done to get a perfect score on the test and stay on top? The empty days continue ... That's right, when I decided to die ...! A woman trying to jump off the pedestrian bridge in front of her! I stopped reflexively, but in fact, this woman, Isogai, was a high school teacher. The teacher's name is Mayumi Asahi. Is this teacher acting shallow for some reason? And it's easy to get depressed, I don't know what I'm thinking about ... Isogai is at the mercy of Mayumi.