I've got kind of a lot to throw at the wall here, so sorry in advance!
-Shiolp's constant dialogue kind of dampens the sexy mystery and scariness for me, I'd like a button in the menu that lets me flip off his text box.
-Once your hallway is maxed out with perma-lockers and gas-lockers, the default tentacle lockers kind of feel like a bummer. They're much more risky then the perma-lockers and the reward feels too modest in the endgame. So, what if you could spend levelup points to upgrade the base tentacle lockers to turn them in to more rewarding "tier 2" lockers that are really worth the risk?
Locker Ideas:
-Aphrodisiac Locker: After this locker gets lust out of a girl and lets her go, it releases a cloud of aphrodisiac to anyone around. Instead of turning to report you, nearby girls instead turn in to those "heart" variants that won't report you and give additional points if grabbed by other lockers.
-Mind Control Locker: Once this locker is done with a girl, it puts a tentacle in her brain! The girl who comes out can spread lies for you to reduce the "report level", or perhaps lure other girls in front of a tentacle locker so that you can wait for the perfect solitary moment to grab them.
-Cowprint Locker: These don't just get lust from a person, they also get milk! I have no idea what you'd actually spend the milk on, though... maybe it's a currency that unlocks new outfits for girls that show up, or unlocks new girls for the hallway altogether? Maybe between days you can use the milk to bribe the administration/student council for benefits? Anything's possible.
Anyway, was so excited to see and buy this game. Looking forward to wherever it goes!