Everything Shall end Eventually is the story of Alex Kurosaki, a Devil, living in the human world as the globally ranked 4th in the professional fighting scene.As threats toward Lucifers little sister, Lia zi Lucifer, creep in, the Devil King decided it was necessary to appoint Alex as her Guardian and Tutor. To his dismay she brought along her entourage consisting of Akiha zi Baal and Adrian van Hellsing, who are childhood friends of the little princess.Together with his best friend Kazuto, Lia and her entourage, Alex works with and for the Devil King all while keeping his career alive and protecting and teaching Lia.His greatest challenge however remains dealing with the demons of his past, protecting Lia from their claws and fighting through the fate they dealt him.