1girl, bed, bedroom, black_camisole, blonde_hair, blue_eyes, blush, bow, breasts, camisole, gold_city_(umamusume), grey_shorts, hair_bow, hand_under_clothes, hand_under_shirt, hand_up, horse_girl, indoors, long_hair, looking_at_viewer, medium_breasts, mefuyaka, morning, navel, parted_lips, rubbing_eyes, scratching_stomach, shirt, shorts, umamusume, uneven_eyes, waking_up, window