Title: Tensei Maou no Juliet
Author: Kuji Masamune(Ecstas Online, Masou Gakuen Hybrid x Heart and Maou Gakuen no Hangyakusha)
Artist: Miyama Zero
Synopis: Hart is an apprentice at the magician academy and is a commoner. He falls in love with the opposing country's princess, Iris, who's carrying half the body of the demon king within her and will lead to the destruction of the world if she gets together with him. However, Hart will smash all obligations and curses for her sake.