Setsuna is a high school boy. One day, he and his boyfriend went to visit the painting exhibition of his senior sister Simi, but they were cursed by the person in the painting. From then on, I would fall asleep at 23:23 every night. When I fell asleep, I would dream of bizarre stories, and I would wake up at 2:20 in the morning. What is special about these two times? When the stories in the dream are connected together, it turns out to be... The guidance of female classmate Piaoxue, the mysterious disappearance of senior Ximi, the various anomalies of her boyfriend, the true identities of Porridge and Haibei siblings... Everything started with him and ended with him...