The first day.

A some time after the events of the prologe in the Fate/Stay night Unlimited Blade Works:Son of Kotomine. Y/N finds himself working for the one and only Touko Aozaki, and she has him go on jobs and mission with Lord El-Melloi II and his students such as Gray, Flat Escardos, his step-cousin Luvia Edelfelt and many others while still being around his best freind Shirou Emiya and step-sister Rin Tohsaka and his lover Medusa.