1girl, d, animal_ears, armpits, arms_up, blush, bound, bound_arms, breasts, brown_hair, christmas, cleavage, daiwa_scarlet_(scarlet_nuit_etoile)_(umamusume), daiwa_scarlet_(umamusume), fang, hair_between_eyes, hair_intakes, horse_ears, horse_girl, huge_breasts, kshimu, long_hair, lying, official_alternate_hairstyle, on_back, one_eye_closed, red_eyes, restrained, ribbon, skin_fang, smile, solo, tiara, umamusume, upper_body, very_long_hair