Frequently Asked Questions
Oldboy is based loosely on a Japanese manga Old Boy, written by Nobuaki Minegishi and Garon Tsuchiya. Oldboy, the film, is the second installment of The Vengeance Trilogy, preceded by Sympathy for Mr. Vengeance and followed by Sympathy for Lady Vengeance.
No, the ending is totally different. There are new characters involved, and the ultimate cause for Wojin's revenge is not the same as in the movie.