SEE ALSO: Japanese media outlets predict Honda Hitomi will seek promotion opportunities in Korea after parting ways with her agency

The star has been busy this year in the acting field, but recently collaborated with Double K by featuring in the rapper's single as a vocalist, and now, he'll be picking up his singing career again with his 6th digital single album! Exciting news for Seo In Guk fans everywhere! 

Stay tuned for more info on Seo In Guk's comeback, set for December 28!