The key to saving the world is this heart chosen by God. Haruyoshi Sawamura, a high school student who survived a miracle in a traffic accident as soon as he entered school. On the first day when I went to school with my childhood friend Minazuki Rain, I suddenly changed due to an event with rain. Haruyoshi is pierced by the runaway rain with superhuman power. An angel holding his own heart appeared before Haruyoshi, who was prepared to die—!? A full-scale battle dark fantasy begins, in which an angel and a devil fight over one heart!!