The first in a very, very long series of similiar games, featuring a purple-haired demon boy (Bass), and a girl (Lime) and her slime in adventures against a series of animated objects. It is only a "game" in the loosest sense, you click all the options and advance. There is some animation, but it is rather limited. I imagine there's nudity, I played it for 30 minutes, and used the Neko Project save state, only to find it didn't work properly when loading later.

A full English patch for all games in this series is available for download on this website.