Is this properly ripped? It seems strange to me that it is only at a resolution of 1100 (and I have used Melonbooks before) .
and if this is the original quality. not going to lie, I'm going to be quite disappointed because I'm was really interested in this doujin. Even the public versions of Pixiv looks better
The color is obviously wrong too: the original files are in CYMK channels, and they are forced into RGB, instead of having a proper conversion.
This is what it should look like https://i.imgur.com/XRM4h3x.png by manually mapping the channel back first (approximation, since the K channel is already lost.)