2girls, air groove (umamusume), alternate costume, black hair, blue eyes, blush, breasts, check translation, 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