1girl, d, agnes_tachyon_(umamusume), ahoge, animal_ears, black_pantyhose, black_shirt, brown_hair, coat, collared_shirt, cowboy_shot, ear_ornament, horse_ears, kushinaka, lab_coat, no_pants, open_clothes, open_coat, pantyhose, pen, red_eyes, shirt, simple_background, sleeves_past_fingers, sleeves_past_wrists, smile, solo, umamusume, white_background