SDMU-332: 每靠近10釐米，獎金將增加10,000日元！ “在父母不知情的情況下做愛時，你能走多近？” - 三對好朋友和兄弟姐妹在家裡偷偷挑戰！ 雞賽！！

Every time you get 10 cm closer, the prize money will increase by 10,000 yen! "How close can you get while having sex without your parents finding out?" - Three pairs of good friends and siblings secretly challenge at home! Incest Chicken Race!!