Damian was once a student of Union Academy, a school for heroes till he was expelled and he found himself at a club and was enticed by someone, or maybe it was something, the next day Damian wakes up in a dark manor covered in blood, what happened to him, who did this, what is he?

Today, marks the death of the Last Master of Humanity that fought bravely against the Beast that tries to wipe out Mankind. Losing the one he love the most, as well as his best friend, Ritsuka does his last ditch effort to fought toe to toe against a weakened Goetia, taking the demon with him. But little did he know, is that he came to regret it later, as he beloved servants, and Mash, who he thought to be dead, is alive, and mourning for him. With every tears they drop, it weight his regret further, even after death. And as a result, he goes to the grim afterlife known as the Shadowland, with him no longer a human, but an ethereal being that lives on pure emotions known as Wraiths. He wants to go back, want to tell them that he's alright. But he can't, for he is dead, while they were alive. A journey to resurrect Ritsuka awaits.