Imouto Netsuai Ryouiki Anime Details and Episodes Second volume in the “Imouto Series”. 1. Imouto no Giri Giri (義妹のギリギリ 夏); Comic Penguin Club 2011-09 2-3, 12. Imouto Lesson (義妹レッスン); Comic Penguin Club… Series info Watch free DetailsFormatMangaStatusFinishedSourceOriginalCountryJapan GenresHentai RelatedImouto Zettai Ryouiki (Prequel)Imouto Shojo Gensou (Sequel) RecommendationsSakura no Nioi