[Crossover] The Smiling Great Demon King

Foolish! Foolish! Foolish! As the top graduate of the Super Demon Academy, Lucy simply cannot stand that the foolish demons at the idiot demon school next door have forgotten their duty as demons! Not only are their wicked deeds in the human world growing fewer by the day, they're even being manipulated by angels doing their own field training down below. This is a disgrace to all demons! Unable to bear watching those idiots keep ruining the demons' reputation, the demon girl who renamed herself Great Demon Lucy also comes down to Earth for field training. She is determined to make these foolish humans remember the fear they once felt beneath the whispers of demons! But in the end, she discovers one thing: humanity's ability to keep up with the times is truly terrifying. Some humans are even more frightening than demons! Other works by the author