Coming to Another World! Chuunibyou Is Actually the Only True God

Others rely on hard work to travel through time, but I relied on a secondary school setting book full of delusions. They learned the fireball technique, and I reconstructed the "laws"; they worshiped the sages, and I was once the god of the past. When the so-called "god" sent down divine punishment in front of me, I just sighed and snapped my fingers. As a result, the Kingdom of God collapsed. I saluted gracefully to the stunned crowd: "Reintroduce yourself - I am an observer of the world and a coder of rules. Of course, you can also call me... A senior chuunibyou who doesn't want to graduate."