What happens when a human saves another one with a death note?


Since a shinigami dies when he saves a human with his death note, he dies. But
when a human does it, he/she won't die. This makes me wondering what happens
when a human saves another human with a death note. So here's my bad example:

Mr. X is a serial killer.

He sees a young Lady and decides to kill her. He stalks her, to know her
better.

One week later, the boyfriend from the lady gets a death note from a
shinigami.

On the next day, Mr. X tries to kill the lady but her boyfriend writes Mr. Xs
name in his death note. Will the young Lady now get a new lifespan. Or will
she get the lifespan from Mr. X?

(Just an example)




How to use LIX:

> A human death caused by Death Note will indirectly lengthen some other
> human's original life even without a specific intention to lengthen a
> particular person's original life span in the human world.

The lady's life will be lengthened to a new time

