A man sitting on a throne with a demon on it

A white-haired, red-eyed prince sits on a majestic throne inside an abandoned palace. The environment around him is dark and gloomy, with cracks in the walls and cobwebs hanging there. The throne is ornate, with details in gold and precious stones, and is covered by a dusty cloth. The protagonist is wearing royal clothing, with a determined expression on his face, as he stares at the horizon with glowing red eyes