Yashiro, the relentlessly effective chief of the Shinsekai yakuza clan, in Tokyo, is also a blatant sexual pervert and masochist. After being wounded by the sole person he ever loved, he now limits himself to purely physical liaisons and no deeper connection. One afternoon, Yashiro's superior appoints Chikara Doumeki, a recently freed inmate, for the upcoming as his new bodyguard. The stoic and perceptive Doumeki is also awkward and impotent, much to Yashiro's dismay. Even though Yashiro maintains a rule against involving subordinates in every situation, he finds himself oddly attracted to Doumeki, who continually rebuffs his advances. Despite the rejections, Doumeki sees Yashiro as handsome and wishes to remain near him, yet he realizes he can never satisfy his superior foreseeable future. As their bond deeply deepens, their tangled pasts and secrets slowly surface in the shadows. Will these histories impede the budding emotions between them?
