Seo In Guk�shared a behind-the-scenes cut from the studio while he was recording�"No Matter What" for his hit SBS drama 'The Sun of My Master' OST!

SEE ALSO: Seo In Guk sings 'No Matter What' for his own starring drama 'The Sun of My Master' OST

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The singer made fans weak at the knees with his puppy dog eyes and charisma as he gets into the right state of mind to sing "No Matter What", which has already topped music charts.

The passionate song is composed by�Hwang Se Joon�and�Melodesign�and written by�Kim Ji Hyang. It takes listeners inside the heart of Seo In Guk's character�Kang Woo,�and there's no one better to sing it than the actor himself who brings his heartfelt voice to the beautiful track with orchestral accompaniment.

Listen to Seo In Guk's voice on 'The Sun of My Master' every Wednesday and Thursday at 10PM KST!