The art has NOT aged well... I was lowkey hoping that, coming back after years, they would've at least polished the animations (and the progression for some characters) a bit more, but NOPE.
Didn't really feel like playing the full game again, so I made a gallery unlocker since from a quick search there doesn't seem to be one. Extract the attached thingy in the root, it should create a "scenes" subfolder within your "game" folder.
Note 1: I manually enabled the threesome menus, you can't get them in the base game: it looks like they were a planned feature, but the code for them was unfinished. I took the liberty of fixing it up within reason so at least it won't crash. I'd guess the reason they aren't out yet is that the scenes in there suck. Specifically, many of the "landlady" x "rival" scenes don't even really have a proper loop set up, and I'm not about to do this guy's job for him.
Note 2: this is made for version 1.04b. In the unlikely scenario they add more scenes in the future, this **should** still work, but it won't display the new ones. I imagine it would, to some extent, work in older versions too, but honestly I'm not about to check.
Note 3: I noticed some scenes have stats associated with them and you won't be able to see them if you lack the relevant stat. Run cheat_on = 1 in the console and you'll be able to tweak your stats from the smartphone menu.
Note 4: this does NOT have an on-off switch, and due to the way the gallery is coded in this game, you WON'T be able to relock them. If you care about spoilers, back up your save folder before running this, and only restore it after you've removed this.