Hori Kyouko is a popular high school girl, who, despite her ostentatious appearance, excels in academics and has a family-loving character is a completely different person outside of school.
In her workaholic parents' absence, Hori acts as a parent for her little brother since she was young. Between taking care of her brother, feeding them both, and housework, she doesn't have time for a usual teenage social life.
One day, Hori meets someone else who also does not present his true self at school; her quiet, glasses-wearing classmate, Miyamura Izumi . Despite his appearance at school as someone bookish and quite possibly an otaku, Hori realized she could not have been more wrong. Outside of school, Miyamura is a friendly guy with many piercings, and is actually not very good at academics. Miyamura's encounter with Hori's little brother and Hori's discovery of Miyamura's secret begins her new chapter in life!