1girl, accidental_exposure, ass, black_skirt, chair, chalkboard, classroom, desk, fate/kaleid_liner_prisma_illya, fate_(series), from_behind, homurahara_academy_school_uniform, illyasviel_von_einzbern, indoors, loli, long_hair, miniskirt, natopo_uni, on_chair, panties, pleated_skirt, school_chair, school_desk, school_uniform, shirt, short_sleeves, sitting, skirt, skirt_caught_on_object, solo, underwear, wardrobe_malfunction, white_hair, white_panties, white_shirt, window