Owaranai Fuyu, Kowareta Yume no Kuni

Casio and his friends visit an abandoned theme park near Tokyo after winning tickets, despite local rumors. During the trip, one friend isolates Casio and kills him, begging him to save someone named Asebi before he dies. Casio wakes up back at the start of the day and tries to leave, but keeps returning to the same morning. A girl named Asebi appears and explains she has been stuck reliving the same day for a long time. She tells Casio he is now trapped in the same loop and that the only way to escape is by killing someone.