Hori Kyoko, who attends Katagiri High School, has a gorgeous appearance, excellent grades, and is versatile in housework. She has an unknown secret. However, one day, the secret was discovered after his injured brother Sota was sent home by a strange "ピアス" - a gloomy boy in the same class, Miyamura Isumi. Kyoko was surprised by the difference between school and home, and was shaken by seeing another side of her at home. Taking the opportunity of caring for the shy Sota, Miyamura began to visit the Hori family frequently. Well, this is her and his story.