suika (swimy0pe0u u0s), kousaka kirino, kousaka kyousuke, ore no imouto ga konna ni kawaii wake ga nai, santa boots, 1boy, 1girl, animal costume, black hair, boots, brother and sister, brown hair, bustier, christmas, cosplay, earrings, front-tie top, gloves, green eyes, hat, jewelry, lingerie, long hair, midriff, red gloves, reindeer, sack, santa costume, santa hat, short shorts, shorts, siblings, thigh boots, thighhighs, underwear