there's a lot of games that match your request:
The ones I'm quoting you are "female protagonist" and "RPG"
- "
Manilla shaw : blackmail's obsession"
Depending on the outfit, you unlock scenes...
- "
fountain of mana":
little by little your outfit's getting naked
- "
new roissy celine"
game in early development but promising
- "
valentina story"
the game had been abandoned, but it looks like someone took it over.
- "
valiant warrior Astrid"
this game is discontinued, but it's a reference here.
- and mine's "
Lolita gone wild."
for the moment the game is in early development, but there is already enough content to play. All the CGs are declined for each outfit.