Also known as: C99, c99, コミケ99, コミケット99, コミックマーケット99, C99WebCatalog
Comiket event that took place from December 30 to 31, 2021, the first Comiket to be physically held in the midst of the Coronavirus Pandemic which ultimately canceled previous Comiket.
Posts with this tag are covers of doujin to be released for the event as well as posts that reference this event.