1girl :d animal_ears ass_visible_through_thighs ball bangs blue_flower blue_one-piece_swimsuit blue_rose blush breasts brown_hair flower hair_ornament highres horse_ears horse_girl long_hair looking_at_viewer lying_on_water mutenka_(plfgb) one-piece_swimsuit rose satono_diamond_(umamusume) school_swimsuit smile swimsuit tracen_swimsuit umamusume water wet yellow_eyes