Kenja no Mago: Extra Story

Overview

Set thirty-five years before Shin met Merlin, at the Earlshide School where Merlin was a troublesome student, Melinda was a brilliant girl, and a prodigy named Kyle was living a ruthless life in college. When Merlin and Melinda began dating, the news of their relationship spread all over the city. Kyle who received reports of it congratulated them but was actually seething with jealousy. After graduation, Merlin and Melinda became hunters while Kyle became a magician.

Source: AniList