Makoto Katai is a student at Itan Private High School who missed his first week due to illness. Prolonged absenteeism followed, fueled by social anxiety. To deter potential bullying upon his return, he transformed himself: dyeing his hair blonde and training intensively to build a muscular, intimidating physique. This harsh exterior starkly contrasts his inherently gentle nature, creating "gap moe". His stern features, tall stature, and frequent nose band-aid reinforce his delinquent-like look. His social anxiety manifests similarly to communication disorders. He speaks in fragmented, unintentionally threatening phrases and avoids eye contact. Despite this, he yearns for meaningful friendships. Hitohito Tadano recognizes his anxiety and initiates conversation, sparking Katai's deep admiration and romantic feelings for Tadano. Katai misinterprets Shouko Komi's quiet composure as mastery, adding her to his self-created "100 disciples list" for social guidance. His family background shapes him: his father practices martial arts, his mother is reserved, and his younger sister, Ai, is strict and domineering, often training him harshly in their family dojo. Like Katai, his parents and extended family possess timidity beneath rugged appearances, with Ai being the exception. Supported by Tadano and Komi, Katai gradually improves his communication. He joins a friend group including Naruse and Kometani, and later mentors Wakai on interacting with girls during their third year. He navigates unrequited feelings when Tadano and Komi begin dating, experiencing initial distress before finding acceptance and maintaining their friendship. Seated beside Rumiko Manbagi in third year, he forms a rapport with her, though their platonic dynamic leads to relationship misunderstandings. He also displays potential romantic chemistry with Katou Mikuni, though its nature remains ambiguous.