Former MBLAQ member Thunder (Park Sang Hyun) is to make a comeback as a singer for the first time in 1 year and 3 months with a digital single.

Thunder recently posted a cover art of his digital single "UP" without any caption. In the album cover photo, Thunder is seen with his back facing the camera and taking a walk in the night.

He brought excitement to his fans after posting the photo of his latest digital single, that he is releasing for the first time in 1 year and 3 months.

It has been revealed that "UP" is a song written and composed by Thunder himself and shares the message of going forward toward a goal without paying attention to what others say.

Meanwhile, it was announced that Thunder will be participating as a judge in the global audition program 'Dream Maker,' which is a show in collaboration between MLD Entertainment, home to Momoland and T1419, and Philippines ABS-CBN TV.