Spellbound, known as Surisuri (Hangul: 수리수리) in Korean, is the repackage of Tense (2014), the seventh Korean studio album by South Korean pop duo TVXQ. It was released on February 27, 2014 by S.M. Entertainment, almost two months after the original record. The repackage features three newly recorded songs, including the lead single "Spellbound". The repackage had two-day shipments of 61,405 copies and debuted at number two on the Gaon Albums Chart. It sold 110,566 physical units in 2014, becoming TVXQ's best-selling repackage album on the chart.

In January 2014, TVXQ released their seventh Korean studio album Tense. The record was promoted as a commemorative album for the duo's tenth debut anniversary, which fell on December 26, 2013. They recorded the album between 2011 and 2013, closely working with longtime collaborators Yoo Young-jin, Kenzie, and Hitchhiker.

Tense was commercially successfully upon its release. It debuted at number one on the Gaon Albums Chart, giving TVXQ their third consecutive number-one since the chart's establishment in 2010. It peaked at number four on Japan's Oricon Albums Chart and number two on the US Billboard World Albums. Music critics reviewed the album favorably, calling it TVXQ's best record since Mirotic (2008). The lead single "Something" debuted on the Gaon Singles Chart at number four, the highest in their career.

Information regarding an expanded album or a second release for Tense arose in early December 2013, when TVXQ revealed that they may separate Tense into two parts. A few weeks after Tense was released in January 2014, S.M. Entertainment disclosed in an interview that TVXQ would announce the release of a new album around mid-February 2014. Speculations of the album's repackage began circulating around social media websites in late January 2014, and the rumors claimed that the repackage would be released on February 17. On February 18, member Max Changmin confirmed that they were preparing for a new single.

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