3girls, aircraft, black_hair, black_legwear, blue_eyes, blue_sky, cannon, cloud, cover, cover_page, day, doujin_cover, dress, glasses, hair_ribbon, hairband, headgear, helicopter, long_hair, machinery, multiple_girls, necktie, outdoors, pantyhose, polearm, red_neckwear, ribbon, sailor_dress, school_uniform, semi-rimless_eyewear, serafuku, ship, sky, solo_focus, spear, thighband_pantyhose, tress_ribbon, turret, under-rim_eyewear, upper_body, watercraft, weapon