Why Are There so Many Things After Defeating the Demon King?

The team of heroes who were summoned to another world finally defeated the Demon King after going through all kinds of hardships! The summoning warlock Claire, who originally planned to spend the rest of her life in a different world, returned to the village she once knew only to find that only ruins were left here! Being plotted, assassinated, and surrounded! Why! Why do so many things happen even though the Demon King has been defeated! Can't you just let me take care of myself in my old age? ! Due to various reasons, the young man had to embark on a journey again!