If you're looking for manga similar to Tales of the Rays: Everlasting Destiny, you might like these titles.
Another story from the world Mizu no Senritsu, which mainly revolves around 'Song', a sub-character in the game. There will be tons of other popular characters from the game as well!
Britannia's seas are being ravaged by monsters under the command of the sorcerer Vitor, head of Magincia's merchants. The young pirate captain Susadora and his gang - accompanied by Rani Sentri, captain of Britannia's special forces - are commanded by Lord British to find arms strong enough to stop Vitor, as well as discover a mysterious truth about Susadora himself.