Watch Oji-san ga Joshi●sei ni Warui Koto wo Oshieru Manga Watch now on Miruro - Free Anime Streaming An old man teaches girls how to be bad. Series info Watch free DetailsFormatMangaStatusFinishedScore59/100SourceOriginalCountryJapan GenresComedyDramaRomance TagsAge Gap RelatedOji-san ga Joshi●sei ni Warui Koto wo Oshieru Hanashi (Alternative)