Shin Sung il is Lost, 신성일의 행방불명 (2006) dir. Shin Jae in

An isolated orphanage, called the House of Angels. The director of this orphanage religiously brainwashes the children into believing that eating is a shameful thing. Among the children, Shin SungIl is the most exemplary student who tries hardest to follow the directors doctrine, but he is also the most chubby. He tries to fast from time to time, only to fail. Meanwhile, the children suspect the directors real intention and plan an uprising to escape from the orphanage. However, it is SungIl who escapes. Out in society, SungIl discovers people eating openly without shame. With hatred toward such depraved people, he feels the pangs of hunger more and more