Yuuki Rin - 20-Year-Old Older Sister's AV Debut!!

Yuuki Rin is a brilliant third-year student at a prestigious private university, known for her intelligence, beauty, and good nature. She lives in Tokyo with her younger brother, and the two are very close—so close that people often mistake them for a couple, though their relationship remains familial. One day, Rin shocks her brother by revealing she has started working as an adult film actress and asks him to keep it secret from their parents. As the brother watches her films, he becomes increasingly conflicted and troubled by this revelation. The game explores the complex emotional fallout and tension that emerges within their household as Rin pursues this secret career, presenting a narrative focused on the brother's perspective and the strain it places on their previously uncomplicated sibling bond.