Horimiya centers on Kyouko Hori and Izumi Miyamura, two classmates who seem to belong to completely different worlds. At school, Hori is outgoing, sharp, and popular, but once she gets home she becomes the practical one in her family, handling chores, looking after her younger brother Souta, and keeping the house running while her parents are away. Miyamura, on the other hand, is read as a quiet and gloomy loner, even though outside the classroom he has pierced ears, tattoos, and a more easygoing personality hidden beneath a plain image. A chance meeting exposes those sides of themselves, and the two begin to build a space where they can speak honestly instead of performing for everyone around them.
As Horimiya unfolds, that private connection grows into a warm coming-of-age romance set in ordinary school life. After-school visits, playful teasing, small gestures of care, and the slow work of trust carry the story, while the cast expands to include Toru Ishikawa, Yuki Yoshikawa, Remi Ayasaki, Kakeru Sengoku, Shu Iura, and Sakura Kono. Their friendships, crushes, insecurities, and family ties give the franchise a broader ensemble feel without losing the intimacy at its core, turning everyday routines into a gentle portrait of acceptance, comedy, and being seen for who you really are.