Sung Si Kyung, one of the balladeer kings in Korea, enraptured fans with his velvety voice and sharp wit during his concert which took place this past May 14! 

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The singer belted to Gummy's "You Are My Everything," which is a part of 'Descendants of the Sun's OST. The singer then relayed the tale surrounding his recent biggest regret. He began, "'Descendants of the Sun' was really popular right? I also got an offer to sing the OST. At the time, I had turned down the offer and I regret it so much now." 

The singer continued, "In society, there are times you must be proud and times you must make compromises. Everyone please remember this. I should have gotten down on my knees then," joking lightly about his missed opportunity.