It turns out, former MBLAQ members Lee Joon and Thunder were working together on Lee Joon's surprise single release for fans.

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After recently sharing a photo together in what appeared to be a studio, Lee Joon and Thunder piqued fans' curiosities, and Lee Joon's label Prain TPC has now confirmed that Thunder personally composed and wrote the lyrics for Lee Joon's "What I Want To Give".

The single, a pop ballad genre, is not only Lee Joon's first ever solo music release, but it's also a parting gift from Lee Joon to fans ahead of his upcoming military enlistment. He recently sang the song live for fans during his domestic and Japanese fan meetings.�

Lee Joon's "What I Want To Give", produced by Thunder, will be out on October 18 at 6PM KST. The MV for the single will be released some time next week, and Lee Joon's official military enlistment date is on October 24.�