The slow process of today was kind of making me annoyed. The fact the colour of the first page was not good, I had to do it again. Therefore, I redrew some lines to make the texture of the line thicker and more solid, which would not give a bizarre effect on them. (as I shown below)
After that I continue to finish my pages, when I started to do the background, it was so irritating as there were so detail and straight lines which are hard to draw while using drawing tablet. I drew for 2 hours on a page which is fine but it was tired and required a lot concentration, especially I mixed up the layers several times and need to separate them.