Agency Music & New updated their Twitter and Facebook with individual teaser images for Sweet Sorrow's Song Woo Jin and Sung Jin Hwan in anticipation for part one of their upcoming 4th studio album, 'For Lovers Only.' 

The expressive black-and-white pictures were taken by none other than well-known photographer Hong Jang Hyun, who is known for his work with top celebrities.

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The group will also drop a pre-release track, "Beautiful", which is a romantic song personally composed by member Kim Young Woo and written by member In Ho Jin.  

Music & New said, "The teaser cuts of Song Woo Jin and Sung Jin Hwan released today will be just the beginning as we plan on gradually releasing the individual teaser cuts for In Ho Jin and Kim Young Woo.  We ask for a lot of interest and support for the upcoming pre-release track 'Beautiful' set for May 19."

Meanwhile, you can purchase tickets for Sweet Sorrow's little theater concert, 'Harmony,' starting on May 15 through Interpark.  It will take place twelve times from July 3 to 20 at Ewha Women's University's Samsung Hall.