When Kirei Kotomine, a fifteen-year-old junior high school student who did not participate in the Holy Grail War and did not meet the Shining Gold, met Emiya Kiritsugu, a middle-aged classical literature teacher who lost everything including his health in the Four Wars. When Kirei was stared at by Kirei's dark eyes, and when Kirei became Kiritsugu's class representative, a love story related to abandonment and obsession happened between them.
The setting is that after the Fourth Holy Grail War, Kiritsugu was cursed by the black mud, but there was no fire in Fuyuki City, so Shirou did not appear.
Conception: