1girl, ball, barefoot, beach, beach_towel, beachball, bikini, blue_archive, blue_sky, boat, brown_hair, day, feet, frilled_bikini, frills, full_body, halo, holding, holding_tray, innertube, island, legs, long_hair, lying, maid_headdress, mungersky, navel, ocean, on_back, outdoors, palm_tree, pink_bikini, purple_eyes, sailboat, shizuko_(blue_archive), shizuko_(swimsuit)_(blue_archive), sky, spread_toes, swimsuit, toes, towel, tray, tree, twintails, very_long_hair, watercraft