A high school student, Takue, who blames himself for his sister’s death, is tasked with visiting his classmate Mamidzu Watarase. In the moonlight, the girl’s body emits a faint glow—it’s a symptom of an incurable disease called the "glowing syndrome." Mamidzu knows she doesn’t have long to live and tells Takue about her wish list—things she would like to accomplish before she dies…