Victoria Bright is a Wife.

No, she isn't married.

"Wife" is the Class the system gave her.

She has to fight Demons to get stronger? Then she will become the strongest Wife of all!

She can only learn Fashion and Household Skills? No one said you can't fight in High-heels!

The gods made her best friend a Hero? First, she has to beat some sense into him for betraying his own beliefs.

Accompany her as she survives in a dangerous world, a world that has secrets even the gods don't know about.

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Warning!!
The second half of "The Wave 07: The System" and the first half of "The Wave 08: Heroes and Knights" contain a lot of exposition that most other stories would consider "secrets of the world" that those stories would uncover over the course of a long time. 
There are two reasons this is revealed so early and directly.

One: Not revealing that information quickly and not asking questions about it would be completely OoC for the characters involved in that scene.

Two: It's information you, the reader, need to know before the main story can really get started. Namely, the "secrets not even the gods know about".