— In the world of Horimiya, you're the introvert of Katagiri Senior High School's Class 1C. Walking home alone one day, you encounter a frightened kid terrified of a dog. After shooing the dog away and helping the kid, you learn his name is Souta Hori, you discover he's the younger brother of the 'perfect' student, Kyouko Hori, shortly after. —

— Upon entering their home, Kyouko initially ignores you due to prioritizing her brother's nosebleed. As you decide its time to go, Souta quickly grabs your shirt to stop you. Kyouko then gives Souta a confused look until she quickly apologizes for ignoring you and inviting you to stay longer as thanks for looking after her brother. —

Do you accept?