Takatoshi Tsuda transfers into Ousai Academy's first year, drawn by its convenient location near his home and recent shift to co-education. He finds himself immediately conscripted as the Student Council Vice-President and male representative, a role he holds throughout high school. Tall with light brown eyes and deep brown hair featuring distinctive bangs, his height often makes him the practical helper for shorter council members. He possesses a lean but solid build, sometimes revealing unexpected muscularity. His school uniform is standard, while his casual wardrobe lacks a consistent style. Recognized as attractive by observers like school newspaper head Ranko Hata, he enjoys popularity among female students, though rumors of a relationship with President Shino Amakusa discourage direct advances.

Academically average, Takatoshi compensates with a strong work ethic dedicated to council duties. He balances a laidback approach to leisure with diligent responsibility. His sharp literary talent surfaces in emotionally resonant short stories and razor-edged comebacks to the council's frequent indecent humor, a skill honed through constant exposure. Despite general academic performance, tutoring from council peers leads to gradual improvement. Outside school, he supports his sister Kotomi's studies and household tasks, embodying a dependable familial role. Profoundly emotionally dense regarding romance, he remains oblivious to the affections of multiple girls, including Shino, treasurer Suzu Hagimura, and judo club leader Mutsumi Mitsuba. This trait earns him the nickname "Flag-Crusher" (破滅フラグ, *Hametsu Furagu*) from Eiryou High president Chihiro Uomi.

Interpersonally, Takatoshi serves as the council's primary straight man (*tsukkomi*), countering absurd or suggestive remarks with deadpan wit. His relationships vary: he respects Shino's leadership but cautiously navigates her perverse humor; shares a deeply intuitive, near-telepathic rapport with Suzu, including non-verbal communication and physical reliance during her distress; and maintains wary distance from secretary Aria Shichijō due to her escalated innuendos. He shields Mutsumi from the council's risqué banter, unaware of her feelings, and tolerates frequent provocations from Ranko. His friendship with classmate Kenji Yanagimoto offers normalcy. Uomi, now a relative by marriage, regularly visits his home, storing personal items there. Disciplinary committee president Kaede Igarashi uniquely tolerates his presence despite severe androphobia, while Eiryou vice-president Mori Nozomi shares his grounded demeanor, fostering effortless camaraderie often misinterpreted as romantic tension.

Takatoshi's development emphasizes adaptation and hidden depths. Initially overwhelmed by the council's sexual humor—even falling ill from exhaustion—he grows desensitized, eventually finding their absence unsettling. Beyond academics, he displays exceptional auditory perception, distinguishing nearly identical voices over phone calls. His popularity evolves organically through consistent kindness, though romantic stagnation persists. Key moments include Shino's emotionally charged plea for him to stay during a movie misunderstanding (later clarified as non-romantic) and Suzu's increasing dependency. His backstory reveals prior football engagement, ongoing fandom evidenced by European team posters, a July birthday, nail-biting habits, and accidental discovery of masochism. Family life centers on the Tsuda residence, shaped by Kotomi and frequent guests like Uomi.