ore no imouto ga konna ni kawaii wake ga nai, darker than black, kousaka kirino, kousaka kyousuke, yin (darker than black) (cosplay), hei (darker than black) (cosplay), maromi (am97), cosplay, 1boy, 1girl, blush, brother and sister, fingersmile, grin, hairclip, hair ornament, long hair, mask, nail polish, open mouth, orange hair, ponytail, short hair, siblings, smile, sweat, teeth, tied hair, potential duplicate, revision