This model is 2 characters from 《ムチムチJ○ だぶる売春》 of group コキュの部屋.

prompts: Kokyu_No_Heya style,

沙紀/Saki: SakiKnH, long hair, brown hair, twintails, brown eyes, large breasts,

みのり/Minori: MinoriKnH, long hair, black hair, purple eyes, large breasts,

This CG was released in 2012, so if you want to restore the art style, it's better to use Illustrious or raise the strength.