Kirie Kotomine was supposed to summon Assassin, Hassan of a Hundred Faces to be precise. He failed spectacularly. With years of planning down the drain, the Masters and Servants of the Fourth Holy Grail War must scramble to deal with the unique replacement to Assassin, the Bald Hero for Fun and Profit, Saitama. Gilgamesh is NOT amused. Tokiomi needs to sit down. Kirei...is Kirei.

What if instead of being rescued by Kiritsugu. Shirou was saved by a bald man who wore a heroic cape... Fate was an unexcepted thing. Archer thought to himself.

Rin summoned definitely not Shiro. And whole Holy Grail War become broken… Translated from Russian.

What if the Berserker Illya summoned was not a hero from Greek mythology but a man who became a hero as hobby. OP!Servant

[One-Shot] x [One-Shot] Shirou Emiya - an ordinary boy who wants to be a hero. And to be a hero, one needs to be strong enough to save the people in need. However, when you are literally strong enough to win every battle with one punch, you notice that it's not quite as grand as it sounds... Now with additional Servant Puncher version! [FSN x One Punch-Man Crossover]

A Challenge of One Punch Man x Fate