At the beginning of 2014, Gain released her next EP, titled Truth or Dare, which featured lyrics from Kim Eana, Lee Hyo-ri and JYP, along with guest performers such as Bumkey and Jo Kwon, with the former being featured in the album's first single.
Considered as a "bolder" move for herself, the album was preceded by "Fxxk U", which received mixed reactions from the public due to its theme dealing with domestic violence; however, it was praised by critics.
Ga-In (hangul: 가인) (born Son Ga-In (hangul: 손가인), September 20, 1987) is a South Korean singer, actress, and entertainer.
In the same year, she performed a duet "Must Have Love" with SG Wannabe's leader Kim Yong Jun, which became her first number one hit during the Christmas season.She then returned with Brown Eyed Girls' 5th studio album, Black Box, which was released on July 25, 2013, and later appeared as a guest performer for IU's "Everybody Has Secrets" (Hangul: 누구나 비밀은 있다) on her 2013 release.In the same year Gain parted with LOEN Entertainment and joined the APOP Entertainment roster, while making her first major appearance in film with The Huntresses.The mini-album also achieved modest success, peaking at number two on Gaon Weekly Albums Chart while the title track became her first solo number one hit.
Gain worked with university professor Park Myung-soo (Seoul Arts University) on the tango-inspired choreography for "Irreversible".
The second single "Truth or Dare" (Hangul: 진실 혹은 대담) was released on February 6, 2014 to modest success, while the third single "A Tempo" was released digitally on March 21, 2014.