1girl, abyssal_ship, bikini, black_hair, breasts, cleavage, enemy_lifebuoy_(kancolle), feet_out_of_frame, geru, grey_eyes, hair_ribbon, hair_tubes, innertube, kantai_collection, long_hair, low-tied_long_hair, medium_breasts, mizuho_(kancolle), official_alternate_costume, one-hour_drawing_challenge, ribbon, side-tie_bikini_bottom, sidelocks, swimsuit, very_long_hair, yellow_bikini