Junichirō is a young man obsessed with manga, anime, and games. He was a young genius who published papers in the journals Nature and Science when he was only 17. However, after graduating college, he became a NEET (Not in Education, Employment, or Training) absorbed in his anime blog. Unable to watch Kagami throw away his life, his sister Suzune gets him to work at the Ichō Academy she attends. The head of the school's board, Koyomi Hiiragi, assigns Kagami to his new life as a teacher.