Happy Ending

Heh.

When the story ends happily, which is usually considered when the protagonists win and the antagonists lose. At the end of the Big Fight between the Hero, the Villain, and whoever else happens to be there, the Hero draws their weapon one last time, utters a Badass Line (optional), and puts an end to their enemy. Some time later, the Hero returns home and meets the townspeople who somehow got notified about the Villain's fall (maybe The World Is Healing is a sign that Evil Is Dead). If this isn't where the story really ends, then it might turn out that the Villain isn't really dead or that a second threat is preparing to rise against the Good Guys in the future.

Happy Ending is a kind of Story Ending that can only be achieved if the Good Guys do at least most of what they have to on their journey through the story. Should they fail to complete the to-do list, they'll instead meet an Unhappy Ending and fail the world that that were meant to protect.