At the Beginning, I Was Caught and Blamed and I Got the Demon System.

[Revival of spiritual energy] + [Decisive killing without the Holy Mother] Ye Ziyu traveled through the parallel world for 20 years and could only support his and his mother's lives by selling mutton skewers every day. On the way to being arrested for the crime, he obtained the system. Just when he thought their life would get better and better, he witnessed his mother's death with his own eyes. The boy who slayed demons turned into a demon after all.