Publisher: Kujou no Kai
Caveats: Rape, scatology, bondage, bukkake
As the protagonist “middle age”, you fly through a stage shooting down enemies and collecting nebulous white clouds to fill up your “kefia power” meter. At the end, you face a giant demon girl and must expend the “kefia power” you’ve collected to destroy her clothes. It’s playable, but the awful English translation along with the overall quality of the game makes it more of a laughing riot than erotic.
This game is available from DLsite! Follow the link below for more info.