When you thought this manga might be ending soon, but with how this Boss fight ended, it's seem like just another common arc, even though we get to know more about Yuuna, even her origin, but the most important question still haven't been asked or reveal the answer: Her regrets for keep on staying in the world. And then other characters background anyway. So it's seem like this manga will still be going for long.
But dang, the chapter ending......so what will the tease be next chapter I wonder...