1girl, black_hair, blue_one-piece_swimsuit, breasts, competition_swimsuit, covered_navel, diving_mask, flippers, freediving, goggles, green_eyes, hair_bun, hamaguchi_ayame, holding_breath, idashige_(walkietalkie), idolmaster, idolmaster_cinderella_girls, long_hair, looking_at_viewer, one-piece_swimsuit, single_hair_bun, small_breasts, solo, swimsuit, underwater