How to Properly Send Back a Dimension Traveler

#Creative Fantasy #Dimensional Fantasy #Knights 60 years ago, When a tyrannical emperor ruled the world and chaos reigned, A dimension traveler appeared, defeated the emperor, and quelled the chaos. Afterward, the dimension traveler returned to their original world, And people honored them, continuing the peace. But what's this? Dimension travelers keep coming even after that? And later, even unidentified monsters? Hey! Stop coming now! We're peaceful now, so you don't need to come! Please, just go back to your own world~?!