15996062 After it was revealed that Gu Hye Sun was the one who wrote one of the songs for Seo In Guk's latest single, the full music video for the single "With Laughter or With Tears" has been released! It has generated a lot of buzz, as fans were interested to see the two reenact an adorable couple with back-hugs and all.  Check it out below! What do you think about Seo In Guk's new single?