Kousuke Oura holds the position of vice principal at Tokisadame High School, formally addressed as "Kyōtō sensei." He maintains a calm and professional exterior, yet beneath lies a lingering loneliness and discontent with his monotonous routine. To alleviate this, he discreetly provokes the principal, Shinonome, through lighthearted pranks, sparking a running gag where Shinonome grows increasingly wary of Oura’s supposed ambitions to overtake his role.

His personal life underscores isolation: living alone, his wife’s absence leaving a void in his daily routine, and financial struggles restricting even basic purchases like straw or string for crafting. Health issues linked to past alcohol abuse do little to deter his reliance on drinking. Occasional visits from his daughter, Kimiko, and grandson, Mi-chan, offer fleeting connection, though their interactions often spiral into awkwardness as Mi-chan’s probing questions leave Oura flustered.

Glimpses into his private moments expose vulnerabilities—nostalgic musings on a "lonely, blurred past" hint at unresolved regrets or fractured relationships from earlier years. Despite his reserved demeanor, flashes of dry humor surface during school events, though these fleeting attempts at levity rarely pierce his composed facade.

Details regarding his involvement in spin-offs, movies, or extended media beyond the main series remain undocumented.