1girl 4koma black_hair blue_eyes blush brand_name_imitation brother_and_sister closed_eyes comic computer fang full-face_blush hair_ornament hairclip heart incest kiss kousaka_kirino kousaka_kyousuke laptop long_hair open_mouth orange_hair ore_no_imouto_ga_konna_ni_kawaii_wake_ga_nai profile rifyu short_hair siblings toshiba translated trembling