yonezuka ryou, original, 3girls, braid, brown hair, character name, i-58 (submarine), imperial japanese navy, japanese flag, kaiten (weapon), mecha musume, military, multicolored hair, multiple girls, no pants, ocean, oekaki, one-piece swimsuit, open mouth, outdoors, personification, red eyes, school swimsuit, short hair, submarine, swimsuit, swimsuit under clothes, torpedo, two-tone hair, watercraft, white hair, world war ii