Natsu, my little sister, is a little naughty at 18 years old. When she runs out of money, she's a naughty girl who begs men to have sex with her. Today, she asked her brother for some pocket money, but he said "NO." Natsu, who desperately wants money, decides to seduce her brother in a little naughty way! "If you give me some pocket money, you can do whatever you want with me." There's no way I can refuse the temptation of such a cute little sister!