Yūga Ohta, a college student with a hustler mentality, thrives on monetary pursuits and adrenaline-fueled ventures. His entry into the underground scene begins by distributing Slave Control Method (SCM) devices alongside partner Shinnosuke Tachikawa. The SCM facilitates high-risk duels where losers become slaves, forced to obey their victors unless freed through another duel or their master’s mercy.

Yūga initially manipulates the system through calculated wit games, amassing slaves while collaborating with Eia Arakawa—a shrewd accomplice whose observational prowess and shared appetite for risk he strategically exploits. Though their alliance thrives on mutual cunning, his actions remain fueled by personal exhilaration rather than greed.

A turning point arises when Ryuuou Edogawa outmaneuvers him, resulting in Yūga’s temporary enslavement. Under Ryuuou’s command, he duels an anonymous SCM user later revealed as Eia in disguise. His defeat frees him from Ryuuou’s grip but transfers his subjugation to Eia, cementing her dominance.

Yūga’s tactics shift from opportunistic exploitation to overt antagonism, driven by a mounting hunger for challenge and control. This transformation isolates him from former allies, branding him a manipulative force within the SCM network. Despite strategic ingenuity, overconfidence and reliance on psychological warfare expose vulnerabilities to adversaries’ counterplays.

His background remains sparse, defined solely by his academic status and hustler identity, with no mention of familial ties or pre-SCM history. His narrative centers on navigating SCM power dynamics, clashing with rivals, and facing repercussions of his relentless thirst for thrills.