Well not actually a mistake per se, but most other releases when saving to JPG use a >95% quality setting. IMO 75% seems on the small side... I get that it's the same as the raw quality, but please keep in mind that repeated lossy compression losses do stack, so the remaining quality is like 0.75 * 0.75 = 56% of the original image created by the scanner. A safe option that doesn't further degrade quality is PNG for B/W images (grayscale so as to not bloat file sizes too much), and high-quality JPG or true color PNG for color pages.
Was going to say this was translated almost 11 years ago, but if you're actually going to finish it then no complaints here. Last time I saw this it just stopped with this one.
This guy fucks his wife mother, plays with his wife younger sister, somehow she only has anal sex, no pussy pen in all chapters, and he also fucks his female subordinate.