
The entry link is well-hidden, just click on the musical note after the red text (it's the 2nd one in the whole thing).
I have almost no grasp of Japanese, but it appears to be a collaboration between NaruSaku artists to create a collection of NaruSaku fanart. I posted the link here in case I was wrong (and it's still NaruSaku anyway). Perhaps someone here with a better grasp of the language can explain it better?

It looks like a very interesting site.