The original art (the last one) is from the game Void Stranger, by System Erasure.
https://twitter.com/System_erasure

Everything else is made with img2img on NovelAI.
Images were also recolored and tweaked on Photoshop.

There was not enough Lewd / nsfw content for this game.

AI makes ok work with 8x8 pixels (boobs and waist).
The legs were made with just 4x4 size to save cost, which resulted in some stray pixels.
Tweaked work is at the start and generations at the end.

(Maybe I should try to make some Pizza Tower hentai next)