Sometimes, fate can be cruel and unforgiving and this time is no different. Follow Nagisa as he's thrust into a Great Holy Grail War and has to work with his classmates to defeat the masters of Black, as well as someone close to him.

what if Nagisa was a servant in the fourth holy grail war,even if he did't admit it he always thought of himself as a teacher. can he teach he priest to control his own bloodlust.