What if the fate of two worlds depended on a demon sworn never to intervene again?
The interdimensional gate in the Mountains of Eterna unleashed horrors that forced humanity into a fragile peace led by a man known only as the Lord of the Tower, a demon champion whose neutrality has fractured three times with catastrophic results. Now, ancient powers stir, and old wounds threaten to tear the treaty apart. Nineteen years later, Ryuji Sato, a gifted commoner at Kaladria's most prestigious academy, begins to awaken powers he does not understand. Surrounded by noble cruelty and political plotting, his rise draws dangerous attention from rivals and the Lord of the Tower himself. As tensions build and hidden sins resurface, Ryuji must choose between the path laid before him and forging his own destiny. Everything hinges on his decision, and the wrong choice could plunge both realms back into war.