During a school trip, high school student Akari is suddenly transported to another world. She is summoned by Yomi, a young man of the divine race who has been waiting for more than 100 years for his deceased fiancée to be reborn. It was supposed to be an emotional reunion... but Akari has no memory of her previous life and her appearance and personality are completely different from his fiancée's. Yomi is disappointed and cold, and Akari is confused and rebellious. In the midst of all this, an unexpected situation occurs and....!