A style LoRA based on hentai game RE:BF that I made it as a proof-of-concept. Basically you can simply apply it on any other characters to give them more rounded, cell-shaded looks.

Despite I only trained them with the game's CG (which only contains female), this LoRA also works with male characters too. Though it seems like it would struggle to generate male "prop" characters in a female sex scene, since the AI sampled the colorless silhouette from the in-game CG.

In that case, I think apply the tag "uncensored" and blacklisted tags "unnatural shadow" and "out-of-place shadow" might help lessen the problem a bit.

If you wanted the pose to be less "stiff" (i.e. having the character looking at their right most of the time), you can tone down the strength of LoRA to between 0.7 to 0.9.