Forgotten factors

The past is an...embarrassing topic for Yuuta, namely, his chuunibyou past. He was given a chance to leave that behind, he runs into a girl that pulls him back. The catch? This time it was real. As he readjusts to the new/old power he has, fails to see someone watching him, waiting. No one pays him any mind. Important things were forgotten and now it's coming back to bite everyone