"Happy Ending" is a song recorded by South Korean boy group Seventeen. It was released on May 29, 2019, Pledis Japan, as the group's first non-album and second overall Japanese single. The track debuted at number two on the Oricon Singles Chart.
"Happy Ending" was announced in March 2019 as Seventeen's second Japanese language release, one year after their EP We Make You. The single was released on May 29, 2019, with two b-side tracks; the Japanese versions of "Oh My!" and "Healing". To commemorate the release, the group held four shows in two cities in Japan.
A Korean-language version of the song was released by the group later that year in An Ode, Seventeen's third studio album.