MASM-015 My friend's little sister seemed pure but was actually a bratty, arrogant bitch! She insulted me with polite language saying, 'You're such a pathetic loser,' shattering my adult pride and making me get reverse-cummed on repeatedly. Sandatsu Ena

At a friend's house, I ended up alone with my friend's well-mannered younger sister Ena-chan and we decided to play a game together. When she proposed a penalty game where the loser has to do anything the winner says, I was taken aback and ended up losing. I wondered what kind of cute command little sister would give, but she smiled and said, 'Please get completely naked◇'... Huh? The one who seemed pure turned out to be an extreme sadist wearing a J-system mask! She kept making erotic demands in polite language, and my hellish days of being used as a live dildo began.