Locked Regression- My Life Now Unknown

After the betrayal of a certain person, John is sent back in time to prevent the man from getting too strong. However, the regression is tampered with and John lost all his memories. However, when he returned to being 5, he received a “helper”- basically a system that gave him quests due to his “locked regression”. Follow John’s journey with his mission-giving system to reclaim the memories of his first life and stop the man!