The world is a dangerous place teeming with powerful creatures known as monsters.

The only way humanity has found to survive is to construct a massive magical barrier that spans an entire continent: the human continent.

The story follows Ronandt, a young nobleman who, despite his noble origins, has never met his parents. Except for maybe at the time of his birth.

He thus finds himself without parents at the Manor Rosetta, under the close supervision of Mathilda, his nanny, and Syrus, his Butler.

Follow the adventures of Ronandt, a young nobleman like no other.