When fists meet folklore, the underworld doesn’t stand a chance.
Maruo is a hot-blooded martial artist obsessed with becoming the strongest hero—until he’s pulled into the hidden underworld of ayashimon, monstrous yokai who secretly run Japan’s criminal organizations. Teaming up with the level-headed Urara, Maruo dives headfirst into brutal turf wars where fists clash with supernatural power. Stylish, fast-paced, and unapologetically intense, this urban fantasy blends classic shonen action with yokai myth and modern crime drama.