It sounds like you’re referring to a specific mod, game version, or fan edit — likely tied to Dead or Alive , Senran Kagura , or a similar fighting/action game with a character named Kasumi (e.g., Kasumi Rebirth is also a known adult-oriented flash game series).
Kasumi Rebirth Full Version V3 1 18 Page
It sounds like you’re referring to a specific mod, game version, or fan edit — likely tied to Dead or Alive , Senran Kagura , or a similar fighting/action game with a character named Kasumi (e.g., Kasumi Rebirth is also a known adult-oriented flash game series).