Re-Living My Life with a Boyfriend Who Doesn't Remember Me (Manga) Vol. 1 - Eiko Mutsuhana - Bog

"Oriana, a seventeen-year-old magic student, suddenly dies alongside her boyfriend, Vincent. However, she returns from death in the body of her seven-year-old self with the memories of her past life intact--except for the knowledge of what killed her. She fantasizes for years about reuniting with her beloved, but when they finally meet, Vincent doesn't remember her! Can she make Vincent fall in love with her again and avoid the death that started this mysterious time loop?"--