Rengoku no Ashe

Rengoku no Ashe (煉獄のアーシェ, lit. "Ashe of Purgatory") is a one-shot manga by Tatsuya Endou. It was serialized in Jump SQ.

Plot
In the age where the Church is the law and witch hunting is rampant, Bell, a sword toting monk, visits a town called Brokken Brook. There, he meets a nurse in-training named Ashe who helped him treat his wound, but little did he know—just when he started to get to know her better—who she really is.