At a friend's house, i was left alone with his polite younger sister sumire-chan to play games together. we agreed to a penalty game where the loser had to obey any command. i lost, expecting cute orders, but she smiled and said, "please strip naked"... what? she was a super sadist hiding behind a pure facade! she demanded lewd acts in polite language, and my hellish days of being milked dry as a live dildo began.