1girl, animal_ears, bikini, blue_eyes, breasts, bright_pupils, cleavage, closed_mouth, collarbone, ears_through_headwear, eyewear_on_headwear, frilled_bikini, frills, grey_hair, groin, hat, holding, holding_innertube, horse_ears, horse_girl, horse_tail, innertube, jacket, looking_at_viewer, navel, open_clothes, open_jacket, outdoors, seiun_sky_(umamusume), shading_eyes, short_hair, small_breasts, smile, solo, straw_hat, swimsuit, tail, tetra_(ktet4_illu), umamusume, wading, water, white_jacket