Kinsei no Rivere Anime Details and Episodes Kugami Sugara just wants to lead a peaceful school life. But being chosen by the beautiful and talented Shirasagi Yui to be her pseudo 'sister', her life… Series info Watch free DetailsFormatMangaStatusFinishedScore59/100SourceOriginalCountryJapan GenresComedySlice of Life TagsYuriPrimarily Female CastFemale ProtagonistPrimarily Teen CastLove TriangleTwinsSchoolBoarding School RecommendationsKankaku Kyouyuu Maid-san!Ojou-sama wa Love Come no Shujinkou ni Naritai!Pops.