I found this recently. I had to search to found some information of it, since isn't translated to english:
Synopsis: (Translated of italian)
In this world, humanity lives on board "islands" floating in the sky. The sky, however, is also the domain of the "dragon-fish", huge flying monsters that endanger the very existence of the floating cities and ships with which people move from one to another. In order to fight them, a body of "guardians" was set up, soldiers specially appointed to protect the population in the event of an attack by dragon-fish.
Yu, a young guardian, decides to go on an adventure with Asebi, a shy android. Their goal? Rediscover the ancient island of Blunt, capital of the
legendary archipelago of Voldesia, once the site of a highly advanced technology civilization - of which Asebi itself is the result.
Status: Ongoing, with 8 volumes/47 chapters. Avg. 2 volumes/year
Doesn't have english translation, but I found it in Chinese:
http://www.1kkk.com/manhua21188/
Some Images
