Midnight Sun is the fifth EP and the sixth overall by South Korean boy band Beast. It was released on July 22, 2012, with "Beautiful Night" as the promotional track. "Midnight" was released one week before the EP's release, on July 15, 2012.

On May 16, 2012, Beast's South Korean comeback was hinted at in tweets to the B2UTYs (Beast fan club) by Cube Entertainment CEO Hong Seong-sung. According to Hong, "All you B2UTYs, we are planning on making the greatest comeback ever known".

On July 3, Beast was seen in a week-long music-video shoot in New York City (from July 1 until July 7). It was the group's first music video filmed outside South Korea. Beast announced their comeback in South Korea on July 11 on Google+, saying that their new EP would be released on July 22. That day, a photo of the EP's title and release date was posted on the band's Korean website. The following day (July 12), Cube Entertainment announced that "Midnight" would be released on July 15. On July 13, photos were posted on Cube Entertainment's Facebook page. The following day, a preview of the music video for "Beautiful Night" was released. On July 15, "Midnight" and its video were released digitally on South Korea music sites. Two days later, Cube Entertainment introduced "Beautiful Night" and posted two photos of Doo-joon, Jun-hyung and Dong-woon. On July 18, two more photos of Hyun-seung, Yo-seob and Gi-kwang were posted. The following day, the EP's track list and composers were announced. On July 20, a preview of the music video for "Beautiful Night" was released on Beast's YouTube channel. Two days later, the EP and the "Beautiful Night" video were released.

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