Not a game. Just 6 scenes in a row, with only minor railroaded interactions.
Why am I rating it 4/5? It is actually really hot ENF scenes, and given the messaging, this is obviously the demographic this targets.
So, if you're not into ENF, this is 1/5. If you're into ENF, this is 4/5. It doesn't go higher than that due to the railroading and brevity of the game. But, it is still worth playing due to the hotness of the scenes.