Oh Imouto Anime Details and Episodes 1-6. Oh Imoto (大妹) She loved to scrub her onii-chan's back when they were little. Now they're older, yet she's still fixated on him. When onii-chan… Series info Watch free DetailsFormatMangaStatusFinishedScore52/100SourceOriginalCountryJapan GenresComedyEcchiHentaiRomance TagsIncestSchoolAnthologyTanned SkinThreesomeCrossdressing RecommendationsHimitsu no GalShota Summer