Yukari Kobayakawa is a 17-year-old prodigious author who has found a way to profit from déjà vu. Born with the ability to remember and revisit past lives, Yukari is held in high esteem for his historically accurate and popular novels written without conducting research. He is accustomed to and unfazed by his fans. However, his new classmate Mahoro Tachibana is not just another fan; they have known each other in another life. Yukari must figure out the nature of their past relationship.