Sorry,Ao no Flag 55 is not avaiable yet. We will update Ao no Flag as soon as it is released.
If you want to read new chapter of Ao no Flag at the first time,you can subscribe it. We’ll send your the email as soon as Ao no Flag 55 updates.

Have more fun on facebook:

https://www.facebook.com/mangahomelife/

Or enjoy fantasy shoujo moments on tumblr:

https://onlyshoujo.tumblr.com/

You can read some other great manga to kill time