Seo In Guk makes his comeback this week with his latest track “Mellow Spring.” While he has gained a lot of popularity though acting in dramas these past few years, you definitely cannot forget that he was the winner of Superstar K‘s first season. His charming voice makes this a great spring song. As seen in the music video teaser, Seo In Guk is seen taking in a lot of coffee at a worrying rate, and is not able to sleep. The video filled with beautiful filmography has been directed by Digipedi, one of the hottest art director teams at the moment. Through sweet and stylish visuals, the music video reflects the excitement that one feels when falling in love.