The Great Cleric

An unfortunate incident kills a salaryman and he is reincarnated on a fantasy world as a fifteen-year-old boy named Luciel; Luciel uses his business skills to talk his way into a nearby town's Healer's Guild, where he begins a crash course in magic.

Luciel starts to get a handle on his healing powers and what it's going to take to improve them and survive in this new world, so he charts a course for a rather unexpected training destination-the Adventurers' Guild.

Luciel heals free and gains trust; Fed gigantic meals, drinks Substance-X; Popularity rises healing Cat-folk; Training intensifies, Brod pays fees, gifts Holy magic book.

Luciel is given a break from training to learn about butchering monsters with Gulgar's brother, Galba, and study world history and culture with Nanaella; while shopping with Nanaella one day, he discovers Monika unconscious on the street.

It's been a year and Luciel needs to renew his registration at the Healer's Guild; Luciel jumps into the next level of his training, when he encounters the healer who left Monika to die.

Brod decides that Luciel needs to get stronger.