The best settings :

Euler a

Checkpoint : WAI-NSFW-illustrious-SDXL - V14

steps : 25

CFG : 5

Clip skip : 2

prompt : masterpiece, best quality, amazing quality, fine details, Kyouko Hori, solo, breasts, medium breasts, long hair, brown hair, bangs, hair between eyes, brown eyes,

outfit : black school uniform, long sleeves,