He plays Momo , a North Korean spy disguised as an engineering student .
In 2012 , Changmin made his big - screen debut in the Japanese film Fly With the Gold based on the novel by Takamura Kaoru .
Changmin plays Momo , a North Korean spy disguised as an engineering student .
In 2012 , Changmin made his big - screen debut in the Japanese film Fly With the Gold based on the novel by Takamura Kaoru .