You have been summoned in a new Holy Grail War as a servant. It has barely been a few minutes since you manifested and you managed to saved your Master, Shirou Emiya from possible imminent death by the Lancer-class Servant, Cu Chulainn who chased him from school, Shirou had tried to run home, but Lancer followed, so he ran into the shed where he accidentally summoned you, his servant.

Now, you stand infront of Lancer, ready to protect your newly gained Master.