Read manga: I'm The Demon King!

manga
Other name: まおうさ ; Maou sa ; Maousa ; Maousa!
Genres: Comedy ; Fantasy ; One shot ; Shoujo
Artists: Nozaki Ayu
Status: completed
Latest chapter: Chapter 001
Updated at: Aug 25, 2019
Summary:

From The Zero Alliance:In the midst of a battle against heroes, the demon king, Rou is transported to a different world, where he ends up as a high school transfer student. When his classmate, Hitose discovers his true identity, she tells Rou that she wants to help him get back home. Although Rou thinks of Hitose as annoying and strange at first, they manage to form a friendship.