Park Si Hwan signaled his debut by releasing a teaser image of himself.

In the picture revealed yesterday, Park Si Hwan is topless, wearing nothing but smokey makeup.

Net users enthusiastically commented: "He has been hiding his beauty all along!", "I knew he was good looking since 'Superstar K5', but he's more than good looking", "His defined nose and jaw might just slice me".

The provocative teaser concept is said to have been suggested by Park Si Hwan himself. Staff excaimed that the image is a representation of Park Si Hwan's desire to show his determination in taking off his past self and embracing the future: "Park Si Hwan had not been able to pursue his dreams of being a musician due to his family's financial situation. This is quite a shocking teaser for a rookie singer, but we hope that his efforts geared toward achieving his dream will be appreciated by fans".

Park Si Hwan, to relay his determination, is known to have lost 22 lbs through exercise and diet control. Park Si Hwan commented: "Before I sang to the world, I wanted to prove how passionate I was about my debut and music career".

CJ E&M claimed: "We thank all fans for supporting Park Si Hwan through 'Superstar K5'. We see much potential for Park Si Hwan's future and career".

Meanwhile, Park Si Hwan, who is the first out of the TOP 10 "Superstar K5" finalists to release an album, has already been successful in his soundtrack recording for tvN's "Emergency Couple", topping #1 on Mnet charts.