Succubus Game - Unbeknownst to my Girlfriend, I'm Pleasure Corrupted in My Dreams v1.01 by QRoss

Overview:
I have a cute and pure girlfriend.
You could say she's even out of my league.
However, since we started dating, we haven't advanced past the hand-holding stage,
and I'm at that age where I want to kiss and have lots of sex.

While I'm considering all this, suddenly SHE appeared...
In my dream, a woman calling herself a succubus.

This large-chested woman in revealing clothes makes me play a game.
"If you clear the game, you will awaken as usual. If you lose, you will be punished.
If you refuse, you will never awaken again."
Faced with this, I can only accept the conditions of the game...