If it seems like some of the sets feel "incomplete", that's because Furau's FANBOX has only half of the content from their respective Fantia sets. To those who are aware, due to the way that Fantia functions, you need to pay extra for "back numbers" to view past works from a creator - a "restriction", if you will - on top of any pre-existing subscription fee you're already paying for the artist. Though Furau did explain they used FANBOX to "simply highlight the differences for the sets between the FANBOX and Fantia accounts", it's better for those who want to support the artist to do it through Fantia rather than FANBOX because the number of images per set in the former is almost twice the amount.
In the future, I'll try to get some of these "back-dated" sets, but that'll depend on whether I want to keep supporting this artist or not since I find Fantia's approach to accessing past works really flimsy and obtuse compared to FANBOX.
Damn dude, you have no idea how much I was waiting for this, thank you very much! Really wanted to see those extended fantia sets of that Yunyun and those 2 Aqua posts, it's a shame the site charges extra for that.