Finnishcompany Amimaru has just launched their Facebook manga reader app, and the first title is The Tale of Loewe. According to their posts on Ancient Land of Ys, they are currently collaborating with Field-Y to release the manga that was originally serialized in the monthly issues of Falcom Magazine.
The first chapter of the manga is currently available via their Facebook application, and you can purchase individual chapters using Facebook credits.
Please take note, however- this manga has a lot of spoilers for Sora no Kiseki/Trails in the Sky SC. It is going into the backstory of one of the characters that is further addressed in Second Chapter.