My Otherworldly Self Got Tricked by the System

A chuunibyou teenager transmigrated. He was completely bewildered at first, but once he got his bearings, he was excited and thrilled. His experience told him that he was the protagonist. So he went straight off to challenge the toughest bully in the village. After getting beaten up a few times, he learned his lesson. Ten years later, his fighting spirit had been worn away, but then the System arrived. He became the most powerful person in the village, and that's where our story begins.