Katekyo -kireina Onesan To Himitsu No Lessons- ... May 2026

Katekyo -Kireina Onesan to Himitsu no Lessons- is a Japanese adult visual novel game developed by the doujinshi (indie game) circle, AKS. The game was later adapted into an anime series, manga, and other media. The title roughly translates to "The Beautiful Older Sister and the Secret Lessons."