1girl, ass, back, ball, beachball, bikini, black_bikini, black_hair, blue_eyes, blue_sky, breasts, caron_(straycat910), cloud, day, from_behind, gridman_universe, hair_ornament, hair_scrunchie, medium_breasts, mismatched_bikini, ocean, open_mouth, outdoors, partially_submerged, ponytail, scrunchie, shoulder_blades, side-tie_bikini_bottom, sideboob, sky, solo, ssss.gridman, sun, sunlight, swimsuit, takarada_rikka, wet, white_bikini