Deepened

It was released on February 16, 2016 as a digital single and later included in the third EP from the group, High Heels (2016).

It marks their first release in two and a half years from the group and also with the addition of five new member.

It was also revealed that the group was preparing a new song with a release date within the month.

[2] On February 16, 2016, the song was officially released through digital portals in South Korea, such as MelOn, and on iTunes for the global market.

[5][6] The song made Billboard's 20 Best K-Pop Songs of 2016 list at number 18, stating that "from the smoky opening, the ladies made heartbroken melancholy sound sexier than ever".