2girls, black_hair, glasses, hair_ribbon, hairband, hip_vent, long_hair, long_sleeves, military, military_uniform, monochrome, multiple_girls, naval_uniform, pleated_skirt, purple_theme, ribbon, school_uniform, semi-rimless_eyewear, serafuku, sitting, sitting_on_lap, sitting_on_person, skirt, thighhighs, tress_ribbon, uniform, white_ribbon