2girls, \m/, animal_ears, bandeau, bare_shoulders, black_dress, black_gloves, black_vest, blush, bracelet, breasts, brown_hair, cleavage, cowboy_shot, crop_top, daitaku_helios_(devil_in_the_moonlight)_(umamusume), daitaku_helios_(umamusume), demon_horns, demon_wings, double_\m/, dress, elbow_gloves, fangs, gloves, green_eyes, halloween_costume, hand_on_own_hip, horns, horse_ears, horse_girl, horse_tail, jewelry, long_hair, looking_at_viewer, medium_breasts, mejiro_palmer_(devil_in_the_moonlight)_(umamusume), mejiro_palmer_(umamusume), midriff, multiple_girls, navel, official_alternate_costume, open_mouth, ponytail, short_shorts, shorts, single_elbow_glove, smile, solo_focus, solokov_(okb-999), tail, teeth, thigh_strap, umamusume, vest, white_background, wings