OVA
Description
Taisuke Sawanaga attends Sakakino High School as Makoto Itou's classmate and friend. Boisterous and perverted, he frequently provides comic relief. In the *Magical Heart Kokoro-chan* special, Taisuke eagerly shows Makoto gossip magazines detailing the superheroine Magical Heart's exploits, insisting they prove her existence despite Makoto dismissing them as hoaxes. During the zombie outbreak at Sakakino shopping district caused by Doctor S, Taisuke is infected by perversion-inducing gas and transformed into a zombie, chasing Otome Katou and her friends until cornered. After Magical Heart halts the infection, Taisuke reverts to normal but ends up naked, heightening the comedic effect. Later at school, he excitedly shares news about Magical Heart and pictures of the new hero Magical Word taken from Makoto's phone, though Makoto and Sekai show no interest. He also teases Makoto about potentially liking Kokoro due to her resemblance to Magical Heart during a Radish Restaurant visit.

Taisuke is Miki Sawanaga's younger brother. He grew up in Aoi Town, attending middle school with Hikari Kuroda and Tanaka. He harbored a crush on a girl surnamed Mori but was heartbroken when she began dating someone named Shiba. Taisuke envies Makoto's popularity with girls. His family situation is complex; he remains unaware that Ayumu Inou is his biological father. He has numerous relatives, including Sekai Saionji (a paternal cousin) and Setsuna Kiyoura (a cousin once removed). Taisuke belongs to the school's film club.

In the *School Days* visual novel, Taisuke's role depends on player choices. He may date Sekai if Makoto pursues Kotonoha, though the relationship is one-sided and sometimes unwittingly forceful. If Makoto abandons Kotonoha, Taisuke dates her instead, occasionally engaging in non-consensual acts after being misled by Otome Katou's advice. He can also date Hikari Kuroda, either through setup by Makoto and Sekai or Hikari's suggestion. Despite his pervertedness and occasional sexual aggression, Taisuke demonstrates moments of emotional insight. He advises Makoto to commit to his relationship choices and urges Kotonoha to respect Makoto's decisions to prevent her descent into yandere behavior. He shows amicability after breakups and expresses genuine concern for others.

In the *School Days* anime, Taisuke maintains his comic relief role but is heavily implied to rape Kotonoha during the school festival while exploiting her fragile emotional state. He later asks her to date him, but she rejects him. His actions contribute significantly to Kotonoha's psychological breakdown.