I love a good regression book, this is good. It's not slow in the way the story is moving, it's going rather rapid at this point. I think it should build in more character development actually. The supporting character to the MC are actually really slow in my opinion. If it's about holding some secrets until further growth I get it but this adds frustration to my Experience that makes that part drag like molasses. Very much in line w/ nano machine, a hidden assistant the others around cannot see who gives the upper hand, rapid development due this and a secret art found after near death. Art is good, translation is great on asura. Hope this helps.