Gonsaburō Tashiro attends the all-boys high school with the main characters. He has black hair with bleached tips and green eyes, often wearing his bangs short or tied atop his head. His typical outfit is a white school shirt and navy pants, frequently swapping the standard jacket for a green zip-up hoodie, reserving the full uniform for official ceremonies. Tashiro possesses a cheerful, outgoing, and active personality. He enjoys sweets, often shares snacks with friends, and regularly buys lunches from the school store. He communicates bluntly, voicing thoughts without filtering, though rarely with malice. A recurring trait is his preoccupation with finding a girlfriend, sometimes leading to desperation or frustration, especially when comparing himself to peers in relationships. He shows an interest in gaming, occasionally playing on his phone or a Nintendo 3DS. His closest friends are Miyano Yoshikazu, Kuresawa Tasuku, and Shirahama Kyouji. He initially mistook Miyano for a girl. Their dynamic involves lighthearted banter, with Tashiro teasing Miyano about his feminine appearance. He observes Miyano's interactions with Sasaki, directly questioning if they are dating due to their behavior. Despite Miyano's denials, Tashiro supports their relationship. With Kuresawa, he shares a gently teasing rapport, often inviting him to activities outside school. Kuresawa typically declines, citing his girlfriend, which irritates Tashiro. He frequently asks about Kuresawa's relationship experiences but becomes annoyed by perceived bragging. Shirahama, a longtime friend from middle school, shares his concerns about lacking romantic partners. Tashiro trusts Shirahama enough to confide details about Miyano and Sasaki's courtship. Regarding Sasaki Shuumei, Tashiro recognizes Sasaki treats Miyano differently and suspects Sasaki's kindness to him and Kuresawa stems from their connection to Miyano. He supports their relationship without expressing it directly to Sasaki. In the ping pong club, he interacts with former captain Hanzawa Masato. Tashiro reluctantly becomes captain in his second year. Hanzawa occasionally nags him, indicating care. Tashiro is one of the few who has witnessed Hanzawa's anger, notably after skipping practice without reason. Tashiro bleached his hair upon entering high school, but the ping pong club captain prohibited further bleaching. He avoids haircuts to preserve the blonde sections. He works unpaid at a bathhouse near his home, which has a ping pong table, and receives sweets from elderly patrons. He participated in a Christmas group date with classmates but reported being too nervous to recall events. Other incidents include hitting on Kuresawa during a Cultural Festival cross-dressing event without recognizing him, and claiming excessive leg hair makes him unsuitable for crossdressing. His development shows increased responsibility as ping pong club captain by his second year. In his third year, he discusses college plans with Miyano, Shirahama, and Kuresawa, and participates in group activities like discreetly following Sasaki and Miyano during a birthday date with other friends. He remains a consistent presence in the friend group, offering acceptance and camaraderie without judgment toward others' hobbies or relationships.