Just realized this manga existed. Once I figured out it was from the Binbougami ga! author I knew I had to read it. So far it's been a fun read. It's nothing revolutionary, but then again, what is these days? The relationship between Roku and Benio is nice, the art is pretty and the fights so far have been entertaining.
About the last few chapters, the fight with Yuuto was great, especially with Roku and Benio using resonance and Roku getting his improved arm. I did get a D.Gray Man deja vu when Benio got her new legs, though.
In the end Yuuto got away, and there's still Kamui running around too looking for worthy opponents. Well, flashback time! Kid Roku was adorable.