Rengoku Hime Anime Details and Episodes Another world exists one level below the one we live in, the Rengoku. Rengoku is filled with a poisonous gas called "ren". Although "ren" is harmful to… Series info Watch free DetailsFormatNovelStatusFinishedSourceOriginalCountryJapan GenresActionFantasyMysterySupernatural TagsMagic RecommendationsFullmetal Alchemist