>>64633616There’s a C103 tag on pixiv (newest convention)
So search for C103 ホロライブ or C103 にじさんじ, more will come in the next week or so
If you know the artist’s twitter you can check there as well, Atahuta may be doing a Gen 5 doujin but think it’s a Nene one
There’s also some listings for C103 stuff on Melonbooks and Toranoana for preorder