The official website for the Monogatari Series anime ended a countdown on Thursday with an announcement that YOASOBI is performing the theme song “Undead” for the new Monogatari Series Off & Monster Season anime.
The novel series’ “final season” ended with Zoku Owarimonogatari in September 2014, but it featured a teaser for “Monogatari Series, Next Season Tsugimonogatari.”
The novel series’ “Monster Season” launched with the Shinobumonogatari novel in July 2017.
The studio SHAFT returns to adapt the Off Season and Monster Season books in NisiOisin’s Monogatari series The anime’s initial announcement had stated that it is being “produced” this year.