Hideyuki Toyotomi began as a high-achieving student until delinquents pulled him into mahjong. His initial losses plunged him into persistent debt, cementing a pattern of perpetual misfortune known as "Zugan"—a term derived from the Japanese expression for chronic bad luck.

His trajectory shifted after reuniting with Akina Hayami, a pivotal figure from his past. Her confession of feelings provided stability, motivating him to rebalance his life and vow to abandon mahjong. Yet he struggled to sever ties completely with the delinquents or the game, perpetuating his cycle of gambling losses and financial instability.

Akina intervened decisively during a critical mahjong match, her unexpected luck securing him a rare victory. This moment starkly contrasted his inherent misfortune with her fortuitous influence. Nevertheless, his life remained defined by comedic tension—torn between his bond with Akina and his entanglements with the delinquents. This conflict generated ongoing situational friction as he navigated his inability to fully escape gambling.

He continued playing mahjong under various pressures, exposing his persistent vulnerability to the game despite his intentions. His journey intertwined personal relationships, recurring misfortune, and external coercion from his companions.