Simple Omorashi Game - Kasumi Edition is a visual novel-style interactive game developed by Omoeito and sold exclusively on DLsite. The "Kasumi Edition" indicates that the game centers on a heroine named Kasumi. While "Kasumi" is a common female name in Japan, it is famously associated with the protagonist of the Dead or Alive fighting game franchise. However, it is important to note that this version of Kasumi is most likely an original character created by the developer, who has stated they are working with original characters for the series.