Nana Seiken to Maken no Hime Anime Details and Episodes One day, a clan tried to destroy the "Ancient Sword," but the mission was failed. To prevent the next catastrophe, Sakuya, the strongest boy of the clan,… Series info Watch free DetailsFormatNovelStatusAiringSourceOriginalCountryJapan GenresActionAdventureComedyDramaFantasyRomance RelatedNana Seiken to Maken no Hime (Adaptation)