otono (bkt4b), rulership (umamusume), umamusume, commentary, highres, revision, 1girl, animal ears, arm behind back, armpits, bare arms, bare shoulders, bikini, black bikini, breasts, brown hair, cleavage, closed mouth, eyes visible through hair, hair over one eye, hand in own hair, horse ears, horse girl, horse tail, looking at viewer, medium breasts, navel, purple eyes, short hair, smile, solo, stomach, swimsuit, tail