The Problem Devil Comes from Another World

He was taken to a different space by a space user during a competition with superpowers, and unfortunately encountered space turbulence and traveled across the universe to reality. After living for four years, he was brought to the Little Garden by a letter. In the Little Garden, he had the gift to plunge everything into darkness and destruction. After more than a thousand years, he transformed into the Night Demon. What will happen after the three-digit Demon King encounters three problem children? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.