Sakane Yu, a high school student with a love for insects, is attacked one summer night by an otherworldly, monstrous being while visiting a shrine with a friend. Yu is saved at the last moment by “With You,” an organization that deals with phenomena caused by unknown entities—known as “Yū”—such as apparitions and curses. When you come to know the Yū, what is born within you—fear, or reverence? A gem of an occult horror tale set in the height of summer begins!