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

Please read the description.

outfit1 (jacket)
aaichika, short hair, white shirt, collared shirt, black jacket, blazer, open jacket, long sleeves, clothes around waist, green skirt, pleated skirt


outfit2 (without jacket)
aaichika, short hair, white shirt, collared shirt, short sleeves, clothes around waist, green skirt, pleated skirt


outfit3
aaichika, short hair, two side up, hair bow, polka dot bow, serafuku, sailor collar, sailor shirt, short sleeves, black skirt


outfit4
aaichika, short hair, tiara, bridal veil, cleavage, wedding dress, strapless dress, white dress, white gloves, elbow gloves

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