The devil is a part-timer! High school!

"Having been banished to modern-day Japan to attend high school, the Devil King (Maou) and the Hero (Emi) have been fighting a high-stakes battle to control the student council! When Maou manages to win, the defeated Emi feels a terrible pang in her chest... for Maou?! Surely not! Have the high school foibles of the fated rivals just gotten a lot more complicated?"--Back cover.