Sim date games with sex scenes
You play as a cute young woman who can transform and get different costumes and abilities by "magicking" certain objects, like swords, bows, brooms, etc.
The game is in English, but there's no text apart from the start screen and the in-game menu.
The idea is to get as many of them as you can before time runs out.
Some of the girls can also be assimilated when you gain a level after engulfing them for another H-scene and a stat bonus.
Different artists worked on the visual art, so they're not all so awesome; not like a leech-girl could look better anyway.
There is also a worthy sequel, and the finale released.