After Transmigrating into the Book, Chased and Spoiled by Five Brothers

What is the experience of transmigrating into the female supporting character in a group pet novel?

Five brothers dote on the female protagonist, the parents pamper the female protagonist, and even the male god who has been secretly in love for several years deeply loves the female protagonist.

The female supporting character in the book turns dark due to jealousy, crazily badmouths the female protagonist, and in the end, is hated by everyone...

Having learned the ending of the supporting character, Song Jun remains expressionless.

The five brothers who only have eyes for the female protagonist? Give them to the female protagonist.

The parents who infinitely favor the female protagonist? Also give them to the female protagonist.

On the first day of transmigration, Song Jun prepares to run away from home and give the entire family to the female protagonist.

However... Why are the brothers who were cold and indifferent to her now tearfully begging her to come home?

The villain who was destined to end up single and lonely until death, why suddenly insists on marrying no one but her?

What's going on with this increasingly derailed plot? It seems like the female protagonist's group pet halo is broken.