Please rename the show
http://www.tvmaze.com/shows/40145/shingeki-no-bahamut-manaria-friends
The creators of the series apologized to the fans and removed from the title of the series "Shingeki no Bahamut"
and now it's just called "Manaria Friends" / "Mysteria Friends"
The series is not related to the second season of the earlier Rage of Bahamut: Genesis anime.
The main sites have already renamed it.
https://myanimelist.net/anime/31537
https://www.crunchyroll.com/en-gb/mysteria-friends
https://www.animenewsnetwork.com/encyclopedia/anime.php?id=17601
https://anidb.net/perl-bin/animedb.pl?show=anime&aid=11544