Based on the manga by Kanehito Yamada and Tsukasa Abe, Frieren: Beyond Journey's End is a brand-new anime series animated by Madhouse (Death Note, The Girl Who Leapt Through Time, Perfect Blue). The success of the manga has only fueled fans' anticipation for the anime. The emotionally charged fantasy show debuted on Crunchyroll with a two-hour special premiere, collecting the first four episodes.
Source：https://www.cbr.com/frieren-beyond-journeys-end-review/
