My Neighbor Is the God of Creation

The male protagonist is a person with superpowers and an agent who specializes in handling supernatural events. He was accidentally involved in a gun case and discovered that the guns were all turned into toys. With the help of a naturally stupid girl next door, the male protagonist caught the criminal and found the superpower hidden behind it. The hero and the girl also became friends because of this incident, but then all kinds of incredible events happened around them. After getting to know her better, I discovered that this girl was actually a creation god from another world.