Onee-chan wa Uchuu. Anime Details and Episodes Our protagonist loves visiting his grandparents’ house during the summer. The reason is simple: he's in love with his cousin Aoi who lives with them. This… Series info Watch free DetailsFormatMangaStatusFinishedScore53/100SourceOriginalCountryJapan GenresHentai RecommendationsAne Naru MonoAneki... My Sweet Elder SisterAne to KurasuMaster PieceNo Hou ga Zutto Mae kara Suki Datta no NiZoku no Kata ga Zutto Mae kara Suki Datta noniA-Cup no Kanojo yori J-Cup no Kuro Gal no Onee-san no Hou ga Yoi yo ne?