Try size: 512 x 768 (SD 1.5) / 768 x 1024 or above (Pony)
Weights: 0.9~1.0 (SD1.5: you can change clothes in 0.5, but not recommended; Pony: you can change clothes easily)
Clip skip: 2
Training material from flux
Pictures from CalicoMix 8.5 and CalicomixPonyXL 1.0
Note: The girls are more likely to sit down, but it can still be improved according to the description. Because the material is almost qiapo / cheongsam / china dress, so if it is difficult to change clothes. If you want to increase the girl's exposure, please add "bra, unbuttoned, cleavage cutout," (SD 1.5)
Note: "hands on midriff," is not required, and generated pictures lack changes. (Pony)