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

Please read the description.

outfit1
aatoru, short hair, gradient hair, ahoge, earrings, school uniform, black necktie, collared shirt, white shirt, sleeves rolled up, breast pocket, bracelet, wristband, clothes around waist, plaid skirt, grey skirt

outfit2 (not perfect)
bbtoru, short hair, gradient hair, ahoge, hair ornament, hair ribbon, blue choker, collarbone, idol clothes, white shirt, shoulder cutout, short sleeves, midriff, blue skirt

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