Osananajimi Ecchi Anime Details and Episodes On a hot summer school day, the junior is unexpectedly reunited with her beloved senior. "I'll be helping you study." with those words, he leads her into… Series info Watch free DetailsFormatMangaStatusFinishedSourceOriginalCountryJapan GenresHentaiRomance TagsHeterosexualPrimarily Teen CastLarge BreastsNakadashi RelatedOsananajimi Ecchi (Prequel)