Ugata arrives at Maihama Academy as a new friend to the main protagonist. Together, they establish the "Duema Saikou Club" to counter mundane school life through immersive card game enjoyment, marking a central element of Ugata's early involvement.

As the narrative unfolds, Ugata confronts intense personal turmoil and conflict. These struggles climax in Episode 46, "Madness! Ugata's Dream," where internal chaos manifests, triggering a transformation into the altered persona "Hero Ugata." This shift proves pivotal for the character's evolution.

Ugata's arc culminates in the final episodes. A decisive duel against Hero Ugata erupts in Episode 49, "Duel! Abyss and Sun," resolving his primary narrative journey. This confrontation stands among the season's six significant two-part duels, underscoring its critical role in concluding Ugata's storyline. His documented development remains confined to this season's main series.