Hataraku Maou-sama! High School N

A spin off of Hataraku Maou-sama! With the roles all changed, Maou’s a high school student, Chiho’s his classmate, Ashiya is a worker at MgRonald’s!
After being defeated by the Hero, the Demon King flees to Tokyo, Sasazuka and leads a fulfilling school life. But one day, he’s involved in an accident, and his identity is exposed to the former hero, Emi. Suspicious of his apparently irreproachable school life, Emi dons a school uniform and infiltrates the school, but—!