After looking at the RAWs, I'm kinda stunned how badly compressed and low quality they are. Some of the kanji are barely legible.
So for fun I wanted to see if I could clean them up and used some tools to upscale and clean up the images. Some details were lost, and there's still some artifacting that will have to be manually cleaned, but overall they look much nicer now. I gave up cleaning up the corrupted kanji as the source was just that bad, and fixing them would require finding the matching kanji and then repainting it into the image manually. As I don't know how to read kanji this would be a very time consuming task for myself to accomplish, and I've already spent a few hours just doing the upscaling.
For now I've only done Chapter 1. Let me know what you think and if you would like me to do the later chapters just let me know.
https://mega.co.nz/#!KZJnCLCI!4qxtTXiF12NQzvh7-pj12vVFR_ULbnL6Q5PN0xc3hrE