Koinui Mutsuki was on a date with Nanami, a classmate that she is in love with, when he confessed to her.But soon after confessing, he died in a sudden accident and while she was still reeling from the shock, a grim reaper suddenly appeared in front of her. The grim reaper then offered to send her back in time to save Nanami in exchange for a few years of her life.There are two conditions for Nanami's death and they are: 'when Nanami confesses to Mutsuki' and 'in second year of high school'.Will Mutsuki be able to successfully avoid Nanami's confession and save his life?source: https://www.mangaupdates.com/series/iquwnyz/gomen-nanami-kun-to-wa-tsukiaenai
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