Prompt: masterpiece, best quality, absurdres, 1girl, medium hair, black hair, serafuku, short sleeves, school uniform, white shirt, blue pleated skirt, (1boy:1.1), sex, (hetero:1.2),  sitting, girl on top, (straddling, upright straddle, vaginal, penis), pussy, pussy juice, hug, <lora:upright_straddle_back_2-000010:0.75>, (blush:1.5), (sweat), steam, classroom, chair, pants, window, (from behind), smile, half-closed eyes
Negative prompt: (worst quality, low quality:1.4),text, patreon, ((monochrome)),sketch,((((ugly)))), (((duplicate))), ((morbid)), ((mutilated)), out of frame, extra fingers, mutated hands, ((poorly drawn hands)), ((poorly drawn face)), (((mutation))), (((deformed))), ((ugly)), blurry, ((bad anatomy)), (((bad proportions))), ((extra limbs)), cloned face, (((disfigured))), out of frame, ugly, extra limbs, (bad anatomy), gross proportions, (malformed limbs), ((missing arms)), ((missing legs)), (((extra arms))), (((extra legs))), mutated hands, (fused fingers), (too many fingers), (((long neck))), (((lowres))), (worst quality, low quality:1.3), (3D:1.3), signature, watermark, username, artist name, grabbing another's ass