Ashita mo Mata Yuusha no Tonari

A girl named Mao Kurose is preoccupied with her classmate, Kanade Momomiya, who sits beside her. Struggling to understand her emotions, Kurose recalls past-life memories as the Demon Lord, including the moment the Demon Lord killed the Hero. The Hero has the same appearance as Momomiya. The story explores the relationship between the two girls across different timelines.