Seira Kasai - My Dress-Up Darling
Keep in mind that settings may vary slightly between different versions. See below for more details.
When I tested this with different checkpoints and LoRAs, it seemed to work quite well.
Illustrious:
A LoRA weight of 0.9 works great, though you can adjust the strength as you prefer.
Prompts I usually used:
seira_kasai, long hair, white hair, streaked hair, multicolored hair, black streaks, grey eyes, blunt bangs, white collared shirt, black sweater, blue school uniform jacket, light blue skirt, pleated skirt,