An angel who lives in the human world under the fake name Iori Himura. However, when she returns home, she lets go of her wings, and she prefers to be alone so that no one knows her secret. However, since she is an angel, she has much higher physical abilities than an average human, so people sometimes stare at her because she does things that are beyond what an average person can do without realizing it. One day, Narumi, who just moved into the house next door, accidentally finds out because she forgot to hide her wings when Narumi greeted her that morning, and she has to take Narumi into the house to talk to her so that she doesn't have to face the problems of her normal life. Narumi then starts visiting her more often. Since Narumi doesn't have many friends, they become so close that they start to have a bond that is more than just friends.