 After being discharged, Mun's first project was supposed to be KBS' action drama "Poseidon" opposite Kim Ok-bin, set for broadcast in July 2011.However they dropped out when production was halted after the Bombardment of Yeonpyeong incident in November 2010.Instead, he appeared in another KBS drama, "Spy Myung-wol" with Han Ye-seul in July, playing a Korean wave star who is at the center of a kidnap plot by North Korean agents.