What started as a playful strip mahjong session at a house party turned into something completely unexpected! We intended to rip off a novice girl, but the moment she changed into a sexy costume as a penalty, Marina, who was supposed to be a complete amateur, transformed into a "lucky slut"! Every time she grabbed a tile, she'd get Kokushi Musou or Daisangen! Before we knew it, we guys were bankrupt, and we all found ourselves kneeling naked... It wasn't points or money, we who had gone as Marina told us to pay with "sperm"! Every time we got a yakuman, she would mercilessly follow up with a deep titjob and forceful anal sex, squeezing out every last drop! "The night is still young, isn't it?" she smiled, and her relentless onslaught left our crotches completely empty... *The mahjong scenes in this work were supervised by Marina Yakuno.