Eternal Sunshine of the Spotless Mind / Stranger Than Fiction

Stranger Than Fiction:
Karen Effiel is an author writing her latest novel about an isolated man named Harold Crick. What she doesn't know is that her fictionalized character is real. The real Harold Crick is an IRS agent who has lived a dull existence and one day begins to hear Karen's voice as she narrates what she puts on paper to what Harold has and is doing. Because of this Harold enlists the help of a literary professor to find out what is happening and ends up changing things about his life including beginning a relationship with his IRS client, a government-hating bakery owner named Ana Pascal. Harold, however, finds trouble when he hears that Karen plans to kill him.

Eternal Sunshine Of The Spotless Mind:
Joel (Jim Carrey) is stunned to discover that his girlfriend, Clementine (Kate Winslet), has had their tumultuous relationship erased from her mind. Out of desperation, he contacts the inventor of the process, Dr. Howard Mierzwiak (Tom Wilkinson), to get the same treatment. But as his memories of Clementine begin to fade, Joel suddenly realizes how much he still loves her.