The Wretched is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Ji YouChuan was investigating the mysterious organization Blaze in order to take revenge for his parents. 36 demons were released during one of the confrontation with Blaze and he signed a contract with the strongest demon, Chelsea. He joined the “Wrath of Heaven” team for the sake of investigating Blaze even more deeply and to retrieve the 36 demons, but after getting betrayed by his teammates, the sacrifice of his friend, wandering the wastelands and various other incidents, Ji YouChuan and Chelsea will uncover the thousand-years conspiracy behind the Red Rain catastrophe!