Kernel said: I think the chain might be back. But if it is, it means that we backtracked from Shou->Nazrin to Ichirin->Shou->Kogasa->Nue.
I think it still goes to Nazrin, but it's a bit different. Maybe Onikobe decides to go both ways and have Nazrin->Nue(albeit with the other previous crews) in post #1326186 , then have Shou->Kogasa(with Nue) in post #1409282 , and now we got both of them here. I think Nue will continue the series either by going to Byakuren or Mamizou.
I'm saying it backtracks, because of the links and comments on the pixiv images. This one is linked to the Shou->Kogasa one, and that one has a link (with a comment about returning to the "relay") to the Ichirin->Shou one. Which means that Shou->Nazrin image might actually have not been part of the series, and Nazrin might appear "again".