I did managed to beat it, but dunno what ending it is, have sex with her once, and got out with the big door (maybe the locked red door has something?), after that some static and the end.
The scene is pretty good imo for a 170 mb game.
After you beat it the first time, load a save from after you get to have sex with her. When you get to the red door, it'll be unlocked. There's a short cutscene when you find out what's in the door. Then finish the game normally and you'll get a different ending.
From what I can tell, her body is in a coma or something and she's become a ghost? There is a scene where there's the doctor who appears to be threatening her and the MC stands between them. Not sure what happens after or why she can suddenly leave the hospital after you find her body. Anyone have an idea or theory?