I Can Summon Demon Mercenaries

Li Dalong, a mercenary medic with mysterious medical skills, was possessed by an unknown force during an operation in a desert nation and gained the ability to summon demons. Thus began his new life.

He can summon the demons of the Seven Deadly Sins, as well as unaffiliated demons, traveling between the infernal realm and the human world. He puts them to work like mercenaries and shares their abilities.

Living in White Eagle Country, he lets the demons handle trouble, navigating the gray areas as he searches for his true self.