Ayashimon is a supernatural action manga that mixes modern delinquent energy with traditional Japanese yokai mythology, following Maruo Kaido, a fearless street brawler obsessed with martial arts manga who is dragged into the hidden underworld of Ayashimon—criminal yokai syndicates that secretly control the city—where his abnormal physical strength makes him a valuable asset despite being human, plunging him into violent turf wars, bizarre power struggles, and chaotic encounters with monsters drawn from folklore, unfolding through explosive fights, eccentric characters, and urban fantasy world-building that explore themes of strength, belonging, and identity in a society ruled from the shadows, delivering raw action and stylish brutality with a contemporary edge that appeals to fans of delinquent stories and supernatural crime settings, also known as Ayashimon manga, AYASHIMON, あやしもん, Ayashimon Shonen Jump, yokai mafia manga, supernatural yakuza manga, urban fantasy action manga, and delinquent yokai manga.