The torso idea came from MyEmetophobia on FA. They take commissions and do a refined, shaded, and amazing job for a reasonable price. Please, go look at their gallery even if you're not interested in getting one.
This was what I took away from their work inspiring me. My attempt at a torso sketch, unrefined, unshaded. I am quite pleased with this.
Link
UbiquitousToxicity
Overall really good! I would personally have lengthened the stomach/abdomen area, but it still pulls off a good look. I'm quite proud of the difference I've seen between your chibis and these more 'natural' anatomy pics