A 15-year-old Japanese boy enrolls at Lair of Tigris with a single goal: earning money to care for his dying mother. Tragedy strikes during his training when she passes away, leaving him devastated. Mr. X, seeing an opportunity, manipulates the grieving kid into becoming an assassin and orders him to kill Tiger Mask.
The loss and manipulation fuel Ken's rage, and he becomes obsessed with hunting down Naoto—blaming him for everything. Their rivalry escalates into a bitter feud that consumes him, driving toward an inevitable final confrontation. But Naoto eventually breaks through Ken's hatred, helping him see the real villain: Mr. X himself, the one who exploited his grief from the start.
Once Ken understands the truth, his anger shifts. Yellow Devil transforms from rival to trusted friend and ally of Man Tiger. Their partnership becomes unshakeable.
The turning point comes during a brutal fight with a Lair of Tigris operative—who's revealed to be Great Tiger in disguise. Severe injuries from this clash force Great Tiger to retire from wrestling entirely, ending his career before it truly begins.
Content compiled by AnimeList.moe from publicly available sources.
