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

Please read the description.

outfit1
aaritsuki, low twintails, hair ornament, hair bow, white bow, hair flower, halterneck, cleavage, off shoulder, japanese clothes, black kimono, long sleeves, wide sleeves, bridal gauntlets, floral print


outfit2
aaritsuki, low twintails, hair ornament, hair bow, white bow, hair flower, halterneck, bare shoulders, white dress, short dress, sleeveless, belt, thigh strap, floral print

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