Fitch exclusive Rina Otoumi's first drama! Rina, who works as an underwear model in Tokyo, returns to her hometown to celebrate her younger brother's birthday. In contrast to her parents, who are happy to see Rina back home, her younger brother Yuzuru has a gloomy personality and doesn't even come to greet her, instead playing games. When she gets drunk and shows her underwear to her younger brother, who has no interest in girls, she half-jokingly says, "You can touch me a little..." but this awakens his dormant sexual desire... From that day on, her insatiable brother begs her to have sex with him all the time!