I became the villainess's twin sister

Siyeon unfortunately reborn into the game she plays. Strangely enough, she got attached after living for years with her new mother and sister who is none other than Penelope before the event started.
She thought she could avoid the game plot but...

"This damned Gods testing my patience." She cursed at the Gods because they purposely let the game plot continue and didn't explain shits to her.

Now she have to follow the game plot and at the same time, saving her twin sister and mother.
She never plan to save others but it's bonus.