At 7AM KST on the 17th, his song swept the #1 on all 9 real-time charts, including Melon, Olleh, Daum, Naver, Cyworld, Soribada, Bugs, Mnet, and�Monkey3. He's been well loved since 2010's 'Superstar K2', but it's still an incredible feat for his debut song, especially since he was training for 3 years without promotions.

SEE ALSO: INFINITE's "Destiny" and Kang Seung Yoon's "It Rains" go head to head on real time charts

The song's gaining even more love because it's the perfect song to listen during Korea's rainy season. Congratulations to Kang Seung Yoon!

Source: Sports Seoul via Nate

[Thanks to everyone for sending this in!]