1girl, animal_ears, bad_pixiv_id, blush, breasts, cleavage, closed_mouth, crop_top, daiwa_scarlet_(umamusume), hair_between_eyes, hair_spread_out, horse_ears, horse_girl, horse_tail, kuroki_(ma-na-tu), large_breasts, legs, long_hair, looking_at_viewer, lying, midriff, navel, on_back, pajamas, red_eyes, red_hair, shorts, smile, solo, striped, striped_pajamas, striped_shorts, tail, thighs, tiara, umamusume, very_long_hair