1girl, animal_ears, arm_under_breasts, biwa_hayahide_(umamusume), black_shirt, breasts, collared_shirt, cowboy_shot, glasses, grey_hair, hand_in_own_hair, horse_ears, horse_girl, large_breasts, long_hair, p.i.t.d, red-framed_eyewear, shirt, side_slit, solo, umamusume, yellow_eyes