Lost in Paradise.

Khoi, a naive twenty-year-old, travels to Ho Chi Minh City from the countryside to begin a new life. It's his first time in the big city and he's looking for a place to live. He befriends Dong, a handsome extrovert who offers to share his apartment. When Khoi goes to check the place out, he meets Lam, who also appears to be living there. Khoi decides to stay, but while he showers, Dong and Lam - who turn out to be boyfriends - run off with all his cash and belongings.