Densha Otoko Deluxe: The Final Crusade.

Set one year after the events of the original series, Densha Otoko has now become very popular and Akihabara, has become overrun with normal people getting in on the otaku craze. With Densha's popularity on the rise a corporation offers ten million yen to anyone who can find his real identity. Meanwhile, Tsuyoshi tries to keep his and Saori's identities from being discovered.