best quality, high quality, monochrome, greyscale, k4ed34y4s3, 1girl, solo, low ponytail, flat chest, school uniform, white shirt, collared shirt, shirt tucked in, sleeves rolled up, high-waist skirt, pleated skirt, miniskirt, white kneehighs, from behind, looking over shoulder, mysterious quiet expression, school stairwell background, concrete steps, detailed environment

multiple views, lowres, bad quality, sketch, worst quality, low quality, bad anatomy, bad hands, bad fingers, 4koma, censored, jpeg artifacts, 3d, text, speech bubble, english text, chinese text, loli, shota, scan artifacts, signature, twitter username, extra digits, fewer digits, kid, aged down,