Sign-In System: Leading My Sisters to Fortune in the Countryside

She thought she was living her own life—until she discovered she's just a disposable side character in someone else's story. Betrayed by her sister and sent to the countryside, she's destined for a miserable fate: tricked into marriage with an older man, trapped as a stepmother and caregiver, dying tragically before thirty. But this time, armed with a miraculous sign-in system, she's rewriting the script. No more tragic endings—she'll lift herself and her sisters out of poverty, claim the fortune meant for the protagonist, and build an empire from scratch.