What happens when you summon Emiya Shirou in Chaldea

What would happen when Ritsuka summons Emiya Shirou in Chaldea? The result: chaos. Crack fic. (NOTE. THIS IS A COPY AND PASTE FROM THE REAL FANFICTION ON FANFICTION.NET I DO NOT CLAIM OWNERSHIP OF THIS TLDR:support the original author he's going thru shit so be good people!

The Black Dragon

Zato Cero a delinquent who attends Kouh Academy. He's admitting a strange energy which catches Rias' attention, however he's not so cooperative. He wants little to do with anyone and distances everyone that tries to get close to him, why?