PLEASE READ: This is not meant to be a perfect scan by any means (and in fact, I think it's a rough scan at that). I am just surprised that no one else has bothered to scan and upload this book yet, considering it's been out for quite a while now. As such, I took matters into my own hands.
I’ve decided to just quickly scan the individual pages with my awful scanner. I am no good at photoshop, so I won’t bother to attempt to try and combine some of the multi-page artwork or fix colors if they look a bit off. If anyone else wants to fix up coloring or combine the pages, feel free to just do so, you don’t have to credit me.
If anyone else also has a better scan, by all means, please do upload it. I would love to see it digitally in higher quality than what my potato scanner can do.
Please do support Matsuryuu by buying this book, however. The artwork looks fantastic, and even better on the print paper in the book. I hope seeing this scan will make you at least consider supporting the artist (or embrace your newfound love for Helena ;^) )
@Heatsed You can find the optimal scanning resolution for your scanner and this work by choosing different DPI settings until your scan reveals each of the individual color dots the printer used. Going beyond that isn't necessary. It's very rare for doujins to be printed with perfectly smooth color as almost all of them use a variation of color dots in a pattern (3 or 4 colors depends on the shop) for better low-cost shading. https://en.wikipedia.org/wiki/Color_printing#Screening
Your experimenting will show you that picking even numbers like 300 DPI or 600 DPI sometimes results in a "moire" effect where you get a lot of artificats appearing in the scan. When this happens, you simply back down on the DPI used such as using 455 DPI instead of 600 or 275 DPI instead of 300. To reduce the PNG filesize, you can compress them with no loss methods. For example, Ereshkigal in picture #26 is a 19.22MB PNG but can be compressed to 18.66MB with no loss. Every little bit helps reduce the download burden.