IDK if you could really make a walkthrough, per say. Just because you can pretty much go for whatever you want almost whenever. The only times I actually wished I had a walkthrough was when I first found hints about each of the girls' plans.
You can either open it manually by editing a line in the game file, or you can download the modded version, and in there is a file called UnRen.zip. Unzip that, and the .bat file will come out. You can then move it to the main game and use it to open the console.
There's quite a few. Try Princess Trainer, Witch Trainer, Orange Trainer, Four Elements Trainer, Girls in the Big City or Ciri Trainer for starters. Anything with 'trainer' in the name is a good bet.
Following up on K9's advice, I'd highly recommend Four Elements Trainer. There are Love and Slaves routes for the main characters, so if that's your jam that's great. If you're more into making slaves of people and don't mind moving a character around like an actual RPG, then I'd recommend Corruption by Mr. C or something like Harem Collector by Bad Kitty Games. There are other games with enslavement and stuff like that, but if you're a fan of having your favorite cartoons turn sexual, Four Elements is your best bet.
Whole version. Yes, its this small. (Its just compressed more than previous versions really)Could someone tell me if this is just a patch or the whole version of the game? It seems kinda like a small file size compared to other versions.
