ガチナンパ! 耐えられたら100万!姉弟でも欲情するか検証!姉(ドM欲求不満)弟(絶倫)に発情我慢ゲームさせたら成功or性交?
Serious pick-up! If you can endure it, you get 1 million! We test whether even siblings can get horny! If you make an older sister (a masochistic, frustrated girl) and a younger brother (a man of no lust) play a game of enduring their lust, will they succeed or will they have sex?