I Am Heartbroken and Have No Choice but to Save the World

I was originally just a farmer's son who opened a small shop. I had a childhood sweetheart and my fiancée. I originally just wanted to live a simple life, but my fiancée ran away with a mysterious man on the eve of the wedding! In this way, the lovelorn me left the town where I had lived for more than ten years, surrounded by weirdos, reincarnated lovers, furry elves and bears. I encountered some strange people and nonsense on the road, but in this way, I accidentally embarked on the road of saving the world...