I Got Caught Up In a Hero Summon, But the Other World was At Peace

I was suddenly transported to a different world, seemingly caught up in a Hero Summoning. But to my surprise, I wasn’t the chosen Hero, just another guy. Despite my cautiousness, I found myself thrown into what I thought was a war. However, I soon discovered that the Demon Lord had been defeated a thousand years ago and the Hero was just an actor in a festival. The nobles were kind, the Demon Race had a good relationship with humans, and wars hadn’t happened in 800 years. Returning to Earth seemed safe. With this knowledge, I decided to enjoy my life in this peaceful world, engaging in cultural exchanges and experiencing the festival. But for some unknown reason, I found myself surrounded by the heavyweights of this world…