An English teacher struggling in Tokyo, low on money and options, meets Kiyoshi “The Viper” Kuroda — a powerful, heavily tattooed Yakuza gangster — through mutual connections in a smoke-filled izakaya. In exchange for financial support, rent, and visa help, the young man becomes Kiyoshi’s submissive lover. Their first intense encounter in the izakaya’s backroom quickly turns dominant and explicit: rough kissing, face-fucking, and passionate anal sex in multiple positions, complete with choking, tattoos on full display, and raw power play. The protagonist willingly submits to his new “Sugar Daddy,” finding both thrill and opportunity in being owned by the dangerous yakuza boss.