betabeet, super creek (umamusume), trainer (umamusume), umamusume, commentary, highres, 1boy, 1girl, animal ears, black hair, blush, bow, braid, brown hair, closed eyes, couple, ear bow, from behind, hair ornament, horse ears, horse girl, horse tail, laughing, long hair, looking at another, night, night sky, open mouth, outdoors, school uniform, sitting, skirt, sky, smile, star (sky), starry sky, tail, tree