Wataru, who has always been an passive observer of his first love Misa, finds his heart racing when she suddenly reappears in his life. Misa learns that her second chance isn't without consequences. Misa makes her first move to rewrite her dreaded memories from her past life, at her class reunion.

While undergoing cancer treatment, Misa discovers her husband Tomoya is having an affair with her best friend Reina, only to be murdered by the two of them. Instead of dying, she somehow wakes up in 2015, ten years in the past. Armed with knowledge of what's to come, Misa sets out to rewrite her fate and plans her revenge.