Nanatsu no Taizai: Ensa no Edinburgh

Fourteen years after the war with the Demon Clan ended, Prince Tristan of Liones lives with two powers inherited from his parents: the Goddess Clan's magic from Elizabeth and demonic strength from Meliodas. One side can heal people, while the other frightens him because losing control may hurt the very people he wants to protect. When Elizabeth is struck by a mysterious threat, Tristan leaves the kingdom and heads toward Edinburgh in search of its source. His journey leads toward Deathpierce, a former Holy Knight with deep resentment toward demons and goddesses, and to a new companion who knows more than he first admits. For once, Tristan must fight outside his parents' shadow and decide what kind of power he wants to make his own.