2girls, arisugawa_bii, black_hair, blurry, blurry_background, blush, brown_hair, christmas, closed_mouth, eye_contact, grey_eyes, hat, long_hair, looking_at_another, low_twintails, midriff, multiple_girls, navel, original, red_headwear, red_skirt, red_sleeves, santa_hat, skirt, twintails, yuri, zettai_ryouiki