2girls, black_hair, black_legwear, black_skirt, blue_eyes, cardigan, hair_ribbon, long_hair, long_sleeves, looking_at_viewer, multiple_girls, one_eye_closed, pink_cardigan, pleated_skirt, purple_eyes, purple_hair, red_sweater, ribbon, siblings, sisters, skirt, sweater, thighhighs, turtleneck, two_side_up, zettai_ryouiki