and they all lived happily ever after
Traditional formulaic ending to stories, fairy tales, or narratives, signaling a happy conclusion.
See also: めでたし
At the end of the old tale, it says 'and they all lived happily ever after'.
having a happy ending; ending without incident
Extended use to describe any situation, event, or story that concludes happily or uneventfully; often used lightheartedly.
トラブルもなく、旅行はめでたしめでたしだった。
The trip ended without any trouble, a happy ending.
喧嘩したけど仲直りして、めでたしめでたし。
We had a fight but made up, so all's well that ends well.