I'm a Paladin, but I contracted with an Evil God

Leon, who spent his entire life being looked down upon as a half-baked paladin, met a miserable end. At the threshold of death, he contracted with the evil god Echrizé and regressed to the past, only to discover that his stigma—which he had believed to be a divine blessing—was actually an empty vessel. Consequently, Leon decides to fill his stigma with the power of the evil god Echrizé to utilize it like divine power, and takes up his sword once more to uncover the truth behind his death and the world.