Invite j-cup girls to the fixed vibrator house! At first, they are confused and embarrassed, but the prize money tempts them to start the fixed vibrator challenge! With their undeveloped pussies and exposed assholes in the manguri position, they writhe in pleasure as the vibrator penetrates their bodies. They repeat "will i cum... will i cum..." until their bodies stiffen, and finally challenge themselves to hold back their first fixed vibrator orgasm! Which j-cup girl will win the 100 million yen prize? Of course, the penalty game is immediate fucking!