Nico Nico Chokaigi 2017 has naturally caused cosplayers to gather en masse for the festivities, providing attendees with a wealth of stellar sights and otaku with some rather obscure character references to decipher.
Some of the inspiring cosplays present at the event:
Dem Kemono Friends cosplays :3
I saw a pudgy tart!
Rem is overrated, overcosplayed and over here.