Art by Tokifuji, the game was developed by The Poundry.
This gallery contains the images used for the dialogue portraits and full body sprites. By default, the dialogue portraits and facial expressions are separate sprites entirely, they are included by themselves, with a new sheet I made that has all of a character's expressions on a single image placed after them. The images are organized first by the dialogue portraits/expressions and the character they belong to. Then the full body sprites. This gallery does not contain any of the cut-ins/cut-aways, as ALL OF THE ART USED FOR THEM IS THE SAME FROM THE COMIC THE GAME IS BASED OFF OF. They recycled the comic panels, they are NOTHING NEW. The dialogue portraits and standing sprites, however, were made specifically for this game. If you want to see said art, just read the comic here: https://e-hentai.org/g/1273841/589c4407c0/
You'll notice that the dialogue portraits don't have genitals drawn. I looked through all the sprites, none of the portraits have genitals. If you look at the game's page on Steam, you can see in of the page's promotional images one of the portraits of one of the characters actually does have genitals, but that appears to have been a picture from a pre-release build of the game. In the release build, the portraits don't even show the entire image, a portion of the bottom (including the groin) is hidden offscreen.
For the standing sprites, the only character who actually has genitals drawn on their nude standing sprite is that of the protagonist(aside from the rear view sprite of the otter). And even then, the nude standing sprites of the other characters go unused. In both the case for the dialogue portraits and the standing sprites, there's no separate sprite asset for the genitals, unlike the facial expressions. Some of the sprites might be repeated, but they still have a different file name, so I included them anyway, just in case. Among all the standing sprites, only ONE depicts sex (pg. 90), and even then, no genitals are visible. If you haven't guessed by now, this gallery exists so you don't have to play the game, and even then, there's not much to see here.
As for the gameplay itself: its crap. Its just the same plot as the old comic, with a few puzzles thrown in. If you DO play it, there's a walkthrough here: https://gamepretty.com/outside-the-box-walkthrough-achievement-100/
Unfortunately thestormiscumming, no such sprites in the game exist. Like I said in the gallery description, only the protag's standing sprites have genitals, so if you want to see him properly nude, you should just read the original comics. All the cutscene art is recycled from there. https://e-hentai.org/g/1273841/589c4407c0/