Yogoreta Watashi demo Shiawase ni Naremasu ka?

Synopsis

Mutsumi, a girl who engages in "sugar dating," leads a double life as a student and sugar baby to support her family, who have fallen into ruin after their business failed. On June 27th, when she turned 18, Mutsumi returns home to find her parents murdered. Her classmate, Takashi, appears before the distraught Mutsumi. Takashi stabs Mutsumi with a knife, claiming that she stole his family's happiness— and then Mutsumi wakes up in her room eight years earlier. She has returned to June 27th, when she was 10 years old... As she travels back in time and unravels the events surrounding her own death, can Mutsumi, the sugar baby girl, overcome the repeating tragedies and survive beyond June 27th, when she turned 18? A nonstop time-leap suspense. (Source: Comipo, translated)