Read manhwa High School Life Guide for the Great Wizard / A Guide to High School Life for Archmages / 대마법사를 위한 고교생활 가이드

At the request of a sponsor, the life transcendent Oz disguises himself as a Korean high school student. And one day, Dorothy and Toto's knights appear in front of her in a whirlwind! The front of Oz's house is full of locals. What I saw above my shaking legs and shoulders It was a fire that was devouring the little house that Oz had lived in for two years and soaring high. My ears are ringing with fire engine sirens and the sound of fire hoses gushing. Dorothy, that bastard is sitting in the ambulance. Standing wrapped in a towel wrapped around a soot-drenched, soot-drenched Toto. And then he finds Oz... and laughs without knowing it. “Fine. We're fine.” However, the house was unharmed. Oz's nest, which was burnt black, sat up. can graduate high school safely?
https://teenmanhua.com/manga/high-school-life-guide-for-the-great-wizard