Gocchan, formally named Sadayuki Gotō, is a spirited high school student whose cheerful exterior masks a gnawing insecurity rooted in constantly trailing peers like the driven Touma in academics and athletics. This envy fuels his fear of inadequacy, stalling his ability to carve personal ambitions early on. Yet beneath his self-doubt lies a keen emotional perceptiveness, making him the heart of his friend circle—quick to uplift others with humor and spontaneity, even as his impulsivity sometimes sparks reckless choices.

His bond with classmate Aya becomes pivotal: after a near-kiss misunderstanding with Shion strains their rapport, Aya’s heartfelt confession reshapes their connection. Their evolving romance peaks during a daring motorbike escape to save Shion, where Aya’s playful quip about their "movie-scene moment" cements their mutual affection.

Amid corporate conspiracies threatening Shion, Gocchan channels his latent resolve into the group’s missions, proving loyal and brave despite lingering insecurities. Through camaraderie and shared trials, he slowly confronts his fears, inching toward self-acceptance without forsaking his trademark optimism.