With little magical power, the protagonist, Leon, was abandoned in the Demon World immediately after birth. However, his fate took a dramatic turn when he was picked up by the Demon King's Four Heavenly Kings. Leon was personally trained and doted upon by the Four Heavenly Kings, who are among the strongest individuals in the world. Time passed, and he became a fine soldier of the Demon King's army, possessing the power to 'dominate' all magic... and the bodyguard of Alicia, the Demon King's daughter. Leon's new mission was to protect Alicia as she enrolled in the magic academy on an island known as 'Paradise Island'.

「As a member of the Demon King's army, I will fulfill my mission admirably!」

Leon takes on the mission for his benefactors and respected Demon King's Four Heavenly Kings...

「「「「Forget all that, Leon is just too adorable.」」」」

「Wait, you all. Leon is mine, and I'm not letting him go.」

...Unaware of his surroundings, the Four Heavenly Kings and Alicia, the Demon King's daughter, relentlessly dote on Leon.

「Let's attend the academy together, Leon.」

「Of course, Princess!」

「So let's do our best on the mission together, Leon.」

「Of course, Princess!」

「If this mission succeeds, let's get married.」

「Of co... huh?」

【Announcement】

A novelization by Earth Star Novel has been decided!

The illustrator is mmu.

All 2 volumes are now available!

A manga adaptation has begun serialization on Comic Earth Star!

https://www.comic-earthstar.jp/detail/sitennou/