Introduced as TVXQ's tenth anniversary comeback single, "Something" was released by SM Entertainment on January 6, 2014.

It served as the fourth and final single release for the duo's seventh Japanese studio album, Tree (2014).

Within a week of its release, the single was certified gold by the Recording Industry Association of Japan (RIAJ) for shipments of over 100,000.

[5] The lyrics deal with a narcissistic male protagonist who brags about his popularity and his endless number of female admirers.

A sixteen-second teaser trailer for its accompanying music video aired on television and other broadcasting portals in South Korea.

The Japanese version of "Something" was released as a double A-sided CD single, along with "Hide & Seek", in Japan on February 5, 2014.

"Something" received attention for its raw acoustic swing jazz sounds and big band instrumental.

[8] Primarily known for their "dark and intense"[9] SMP music, a unique experimental genre that employs heavy contemporary R&B, rock, and hip hop beats,[10] TVXQ were initially worried that the laid-back sounds of "Something" would garner mixed responses from fans and critics.

[6] The sixteen-second teaser showed various snippets from the actual music video, which ended with words that read "10th Anniversary – Something".

The full music video premiered on TVXQ's official video-sharing channels on January 1, 2014, at 6pm KST.

The outfits worn in the video include flowery and pinstriped cutaway tailcoats, wide-legged trousers, and other roaring twenties-driven pieces, some which were by Ann Demeulemeester from the spring 2014 collection.

[24] The duo closely worked with choreographer Tony Testa and performance director Hwang Sang-hoon for the song's dance choreography.

Drawing inspirations from swing, Charleston and modern jazz dance, it also features many inversions and sliding movements.

The video, running five minutes and twenty-four seconds, begins with U-Know Yunho and Max Changmin appearing in a marble hallway with celestial lighting.

As they walk deeper into the hall, they pass by a portrait of three beautiful muses, who come to life to gaze at the duo.

Changing to more colorful outfits, Yunho and Changmin walk down a staircase and stop at the center of a large ballroom, standing on top of a big letter "X" – the Roman numeral for ten – that is painted on the floor.

Music starts and the scene changes, with TVXQ whispering "she got that something" into lit-up vintage microphones while leaning back-to-back, supported by ropes.

[28] Some viewers are reminded of the glitz and glamour of Las Vegas shows,[29] while others have compared the video's concept to The Great Gatsby and many Broadway musicals.