Bromance: My Brother's Romance.

Since birth, Brando despised his gay twin brother, Brandy, who has been his burden (including the fact that he was mistaken). However, when Brandy was caught in an accident and put into a coma, Brando is forced to impersonate his twin to keep a major business from falling through. Though they had a misunderstanding, Brando gains a new appreciation as he lives his brother's life.