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

Synopsis

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)