Not quite as hoped but still pretty good. Lets you do a few different types of outfits (maybe more with creativity) and a few different types of sideless options. For outfit types theres leotards, swimsuits, dresses, and shirts, for sideless options there's fully sideless (difficult, might make a second version specifically for fully sideless leotards that defy physics), sashes, cross-lacing, side-ties and straps across. I was originally just going to do fully sideless only but decided to try including the other options and it can make it a little difficult to get specifically what you want but it does give variety to it. It seems best at doing sideless shirts I think.

Clip Skip 2, Lora Weight 1.2 (Weight can be adjusted a lot though I think)

Trigger Word: ffsideless
Strongly Recommend: sideless outfit
Other Recommendation: sideboob
Leotards: slleo, leotard, sideless leotard, [COLOR] leotard
Swimsuits: slswimsuit, swimsuit, sideless swimsuit, [COLOR] swimsuit
Dresses: sldress, dress, sideless dress, [COLOR] dress
Shirt: slshirt, shirt, sideless shirt, [COLOR] shirt

Fully Sideless: slfull
Side-Tied Sideless: slsidetie
Cross-Laced Sideless: slcrosslace, cross-laced clothes
Side-Strap Sideless: slsidestrap
Sash Sideless: slsash, sash

Also Consider If Relevant:
side-tie leotard
side-tie dress
cross-laced leotard
cross-laced dress
japanese clothes, kimono
(Note: that last one is nice with the sash tags)