GRAND BLUES!

Set in the grand blue skies up above, the depths of darkness, elder sisters, knights, gentlemen, Vyrn lovers― all the colorful crew members will get to shine in a whole new light! "Kept you waiting, huh? It's time for you to see our final forms!" Join us and take flight to the world in the skies! (Source: Crunchyroll) — Description from AniList community (anilist.co).