Devil of Misfortune

A young adult prince from the Royal demon family in Tartarus (first planet from the sun) has been shipped away to a demon spirit college by the order of his parents. His reward for attending and graduating is getting his own castle and land to himself, and not being bothered by his parents or anyone else. Though, eating him from the inside is a dark illness he cannot face on his own. He is forced to relive the past until he is able to find the solution to his undying illness. He faces the horrors of people and socialism, but in order for him to receive eternal freedom, he must complete his duties to become a powerful demon.

Please note that is a fantasy story, meaning fictional species and made up species exist. Thank you and enjoy.