regulus (reverse:1999), reverse:1999, umamusume, 2girls, alternate universe, animal ears, collared shirt, english text, greyscale, hair bun, hands up, horse ears, horse girl, jacket, kemonomimi mode, lettuce (lettusea), looking at another, looking to the side, monochrome, multiple girls, open mouth, paper, polka dot neckerchief, shirt, short hair, single side bun, speech bubble, spot color, sunglasses, tracen training uniform, track jacket, twitter username, upper body, vest, waistcoat