Isekai Harem Monogatari Anime Details and Episodes Naoki Oikawa was busily fapping away to his naughty porn mags when he was suddenly transported to a fantasy world filled with demon lords, monsters, and…… Series info · Watch free · Trending anime · Airing schedule FormatNovelStatusAiringSourceMangaCountryJapan Fantasy · Hentai Isekai · Female Harem · Elf Isekai Harem Monogatari (Source) Yahari Dungeon ni Harem wo Motomeru no wa Machigatteiru.