By the Grace of the Gods (Manga) 14

Slime's up for one recently deceased middle-aged businessman! When the gods reincarnate him in another world as a boy with magical powers, he discovers that magically tamed slime are an untapped natural resource!

Ryoma’s friend Eliaria is having a hard time at her new school. Her noble pedigree and the overwhelming magic she wields make her classmates keep their distance. Determined not to worry Ryoma, she promised herself she’d make friends, but can Eliaria really find companions at school? A fortuitous encounter and an unexpected long-distance assist from Ryoma create the spark Eliaria needs to turn things around.

Meanwhile, back in Gimul, Ryoma has been tasked to be an instructor for a training expedition in the forest for young aspiring adventurers. Having lived alone in a forest for years, Ryoma is an expert in wilderness survival, but will the young trainees respect his authority when he’s just as young as they are?