Interesting concept! Played through everything there is, it seems
I'm *VERY* pleased that the game has the possibility of watersports! It's my favourite kink, so I hope the future brings much more of it <3<3<3
Maybe Asuka can teach Natsuru to love the piss <3<3<3
As others have pointed out, the lack of any indicator for which doors are useable is a bit of an annoyance. I have a suggestion on how to solve it pretty easily though; just have a small glowing arrow on hte floor pointing towards doors and stairs that are passable. That should be easy to implement and very helpful!
Others have already mentioned the third expose point being very hard to find, and I see you have already mentioned that the next build will move it.
Until then, for anyone else who struggled, here is the location: From the classroom, go into the hallway, then across it to the room where the toilets are. (Do not enter the toilet, nothing is there except for a lady who has pissed in every sink. I love her already <3)
Then, go up the stairs to the left from hte bathrooms, pointing up. Then, on the second floor, go straight up. There should be an area just to the left of a little nook with a water-wall thingie. This area (not the nook) has a cabinet of some kind, made of metal, with parcels on it. The third ring is *behind* this cabinet thing.
Will be paying attention to this as it develops! <3