Big Bangs Dae Sung makes his acting debut in the MBN series Whats Up! The campus youth drama revolves around the love, dreams & trials of a group of university students in the musical department. Dae Sung, Im Joo Hwan ( Tamra Island), Lim Joo Eun ( Arang & the Magistrate), Jang Hee Jin ( Big), Kim Ji Won ( To the Beautiful You) & musical actor Jo Jung Suk ( King 2 Hearts) star as six young people from different walks of life who share the same dream of music & theater. Their very different lives cross paths at Haneul Arts University where they learn to open their hearts to each other & to the stage. Oh Man Seok ( Wild Romance) co-stars as their quirky professor.