Oya ni Naisho no Iedex - Toshikoshi Hen Anime Details and Episodes Note: Published for the 89th edition of the Comiket. Series info Watch free DetailsFormatMangaStatusFinishedSourceOriginalCountryJapan GenresHentai RelatedOya ni Naisho no Iedex - Natsuyasumi no Bessou Hen (Prequel)Oya ni Naisho no Umi no Iedex (Sequel)