2girls, animal_ears, backless_outfit, black_hair, black_sweater, blue_eyes, box, breasts, brown_hair, cleavage, cleavage_cutout, closed_mouth, clothing_cutout, ear_ornament, eishin_flash_(umamusume), hair_between_eyes, heart-shaped_box, heart_cutout, horse_ears, horse_girl, horse_tail, large_breasts, looking_at_viewer, lying, medium_breasts, meme_attire, multiple_girls, on_back, on_stomach, pillow, pink_sweater, short_hair, sideboob, sleeveless, sleeveless_sweater, smart_falcon_(umamusume), smile, sweater, tail, twintails, umamusume, valentine, virgin_killer_sweater, vococo, yellow_eyes