Fate/Grand Order: Fujimaru Ritsuka wa Wakaranai - Nenmatsu Special

Fate/Grand Order 藤丸立香はわからない 年末スペシャル

Ritsuka Fujimaru—humanity's last master. It would not have been possible to restore humanity without him. However, he does have a shortcoming... he is far too honest! A slapstick comedy in which Fujimaru's simple questions sway the heroic spirits!

(Source: MAL News)