The first Fate/Stay Night-Campione! crossover. A Heavens Feel Shirou finds that himself and Illya have been pulled into another world by a corrupted Grail. There his actions lead to him becoming the Eighth god killing Devil King. Now he has to deal with becoming someone who rules where he walks, even if he doesn't want to. That and trying to find a way back home.

He had protected them, saved them. A Sword that ruthlessly cut down all who would dare harm them. But time passed, as well as those he was to protect. He thought that his time had finally come, but it seemed that Fate had other plans. With a girl whose heart was made of glass as a Master and a new War, the Sword recalls his Origin. 'To Protect...'