When Mirai wakes up, she finds herself in a place she doesn't know, and there is a man she doesn't know in front of her.Mirai, who can't remember anything about why she's there, has lost her memory.Then she begins to live with a man she doesn't know who calls herself her husband.It was a life to hide the past of the future.Without knowing this, she began to love a man named her husband and lived a happy life.However, such happy days meet the worst ending with her regained memories.