FASTENING Anime Details and Episodes Music video featuring art, direction and animation by Kawasemi for the song FASTENING by Zutomayo. Series info Watch free DetailsFormatMusicStatusFinishedEpisodes1Duration3 minScore62/100SourceOriginalCountryJapan RelatedKan Saete Kuyashii wa (Shared Characters) RecommendationsDARKENSTUDY MESeigiCan't Be RightInto the Night CharactersUniguri (Supporting)