This volume reveals how the two main characters met. The 2 heroes earn so little depth, but we do not just say that the author knows how to create suspense, because we do not focus at all. A character is swallow a titan? Either. The reader does not care a bit ...
In the 2 nd volume, the design improves (a little), the mangaka always much trouble with action scenes, speed impressions, culminating events, etc. In short, it lacks graphics quality, and professionalism.
At the end of the second volume, I do not think continue reading this series. At best, the plot could turn into a kind of medieval Evangelion. Even in the best case, I do not see how the graphics will become good, and thrilling plot.