Akira just wants to keep the spirit of his grandfather's bathhouse alive, but unfortunately it's wound up in the center of a yakuza turf war, and all four young heads are determined to get it from him by force, manipulation, or seduction(pretty much rape). But one of them, Ryuichi, says he'll protect Akira to fulfill a promise that Akira can't remember. Really just smut, the story is not there. Trigger warning: noncon.
Ninkyou Harem