Ousama no Propose

Synopsis

Saika Kuozaki is an immensely powerful witch blessed with stunning beauty. She is also the sole person capable of stopping the mysterious forces that threaten to annihilate the world every 300 hours. When Saika suffers a fatal injury, she passes both her powers and her physical form to Mushiki Kuga, an ordinary high school boy who stumbles upon her. However, possessing her abilities does not mean Mushiki can wield them effectively. To have any hope of saving the world, he must enroll in an academy for mages while disguised as Saika—and keep his true identity concealed.