Yosuke and Ruri are in the same year and on the same team, but they are constantly fighting with each other. One day, they all have to work overtime at Ruri's house, but the other students go home and they are left alone. The two of them are somehow conscious of each other, which is different from usual. Then, suddenly, there is a power outage and Ruri, who is scared, clings to Yosuke. And so, in the darkness, the distance between the two of them gradually closes...!