As mentioned in the title, pool #11669 had a prequel doujin, and most (if not all) pages of the doujin exist on this site under artists #7944 (Matsuryuu)'s entry. Most of those pages are clearly scanned from a physical copy due to the abundant scan artifacts, while none of the reverse image searches came up with anything pointing to the original Pixiv posts.
Should I re-upload the pages without scan artifacts from a doujin site, or should I gather the already existing pages into a "OreImo - Kuroneko and I doing this and that... (Matsuryuu)" series pool?
Updated