This is quite interesting and fun read. But it screw up at some point.
[ol]First,This is one of the case when manga get successful so author want to keep it alive and kill the first ending plan. At one point, there is a pretty much a final showdown already happen. But using timeskip and it end up in vain. A excuse to kill all the process that should be solve sooner. I mean it ok to keep writing more, but not many can pull that off.
Second issue is the love interest. Why the heck you develop the girl with the MC the whole story and then go back to the childhood friend that wasn't around for age. At first, she become the victim and the goal is save her. But as the story going on, the Girl who introduce after that is the real one have all the development and in the end just for them to split way. WTF ? if development with no pay off, what the point ? [/ol]