weight 0.7 is best.
I created this LoRA as requested.

Please read the description.

outfit1 (jacket)
aaitsuki, long hair, ahoge, star hair ornament, school uniform, blazer, black jacket, open jacket, red sweater, long sleeves, green skirt, pleated skirt


outfit2
aaitsuki, long hair, ahoge, star hair ornament, school uniform, red sweater, sweater vest, short sleeves, green skirt, pleated skirt


outfit3
aaitsuki, long hair, ahoge, star hair ornament, bridal veil, collarbone, bare shoulders, strapless, wedding dress, white dress, wrist cuffs

I uploaded a sample image of the outfit as a post.