Querido Diário (2021)

Both feature a FL's character of her story coming to the real world and the two falling in love. DD is a novel, TMRFTS is a manga.

A character created by the FL comes to life and enters the real world. He then falls in love with the FL.

In both the ML is a fictional character (manga vs. story) who enters the real world and falls in love with the FL who has loved the character since she was a child.

Similarities:
-ML is a fictional character but suddenly turned out to be a real human on FL's birthday.
-Both are fantasy dramas

Both dramas have stories come to life and although they’re different in plot, they stand out against other dramas with a unique fantasy like plot and overall odd-but-good feel to it.

Dear Diary is more fantasy and has 2 warriors from Babylon come to the modern world, with scenes of Babylon as well. My Marvellous Fable has stories of the FL come to life with supernatural/black mirror type elements, while the leads take a road trip. Most of it’s content is either story telling or voice over with select dialogue.

In both dramas, the ML is a fictional character of the FL's diary/novel. After ML comes to the real world, they started to live in the same apartment.

Story characters come to life. Romance as well. W is more suspenseful than dear diary. Both female leads are confused the the beginning.