9th Century Jorvik. After failing to convert various pagan creatures, Brother Cellanus decides on an easier goal: finding his long lost sister and ministering to the local prostitutes. With his handy pastoral manual and a whole lot of optimism, Brother Cellanus is sure he can help his new lady friends embrace modesty and religion.

It is harder than he anticipated.

Also on AO3! There's currently five volumes of this webnovel available there, so I am trying to get as many chapters as I can here, for crossposting purposes.

Also, this story is raunchy, but Cellanus will never break his vow of chastity within the story. That being said, if he is dreaming, it will likely get pretty explicit.