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The album marked the first time in her solo career to feature two title tracks, followed by a Bible-influenced concept.
She then resumed her group activities after the end of the album's promotion.Their virtual marriage came to an end after 15 months in January 2011.She made her acting debut in MBC daily sitcom All My Love.She also appeared as KARA's Goo Hara's friend in her own reality show Hara ON & OFF at the end of 2014.It was announced that Gain would go on to release her fourth solo mini-album (fifth overall), titled Hawwah in February 2015 as a follow-up to her previous Truth or Dare EP.Beside from her activities with the group, she also had solo activities, beginning with her appearance in 4Tomorrow, a collaboration project with 4Minute's Hyuna, After School's UEE and KARA's Han Seung-yeon.
She also released a digital single, titled "We Fell in Love" (우리 사랑하게 됐어요) with then We Got Married partner 2AM Jo Kwon, composed by fellow member Je A, Kim Eana and produced by Lee Min-soo.
Reunited with long-time collaborators of both her home group and her previous debut album, such as lyricist Kim Eana, producer Lee Min-soo and Jo Yeong-cheol, the album was received with positive reacts from both critics and the public, while becoming her first release to take the top spot of Gaon Weekly Albums Chart, also her best selling release to date.
Its title track, "Bloom", was also her best selling track and one of her signature hits to date.
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.
She also released a duet with JYP on April 2012, titled ”Someone Else", to certain success, peaking at number two on Gaon Weekly Singles Chart.