2girls, air_groove_(umamusume), alternate_costume, black_hair, blue_eyes, blush, breasts, collarbone, cosplay, costume_switch, crossed_arms, gloves, hair_between_eyes, hair_ornament, horse_girl, large_breasts, long_hair, looking_at_viewer, medium_breasts, medium_hair, mejiro_dober_(umamusume), multiple_girls, open_mouth, purple_eyes, simple_background, sleeveless, takiki, umamusume