After Transmigrating as the Short-Lived Female Supporting Character

One day, she transmigrated into a book as the female supporting character, whose fiancé is the first devoted male supporting character who is loyal only to the female lead.

According to the plot, she won't live more than a month... orz

*

The Mary Sue female lead in the book smiles alluringly: Reborn, with flowers blooming everywhere.

The devoted male supporting character confesses again: In my eyes, there's only you, not her.

The eighteenth-line minor male supporting character fumes: I'm not the one who jumped off the cliff to follow her in death; I was just admiring the scenery and got pushed down.

Xu Lan raises her eyebrow and sneers coldly: Being a female supporting character is fine, but cannon fodder? No way. Watch how sister makes her female supporting character life exciting... As for the male supporting character, heh, what goes in must come out, and what comes out must go back in!