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

Please read the description.

outfit1 (jacket)
aayotsuba, short hair, hair ribbon, green ribbon, hairband, green bow, collared shirt, sweater vest, blazer, black jacket, open clothes, long sleeves, green skirt, pleated skirt


outfit2 (without jacket)
aayotsuba, short hair, hair ribbon, green ribbon, hairband, green bow, collared shirt, sweater vest, yellow sweater, short sleeves, green skirt, pleated skirt


outfit3
aayotsuba, short hair, head wreath, bare shoulders, cleavage, white dress, sleeveless dress, detached sleeves

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