World ended on 12:31:2024DING!WELCOME TO REBIRTH: 100 DAYS BEFORE DOOMSDAY!Grace Blackwood survived five long years in the apocalypse before she was killed by her own people. Miraculously, she returned to the past with the help of her family's heirloom - exactly 100 days before the Doomsday.Having a space that was upgraded with a system, she took her revenge, stockpiled supplies for the future, and made necessary deals and connections.In her last life, she was alone. But this time, she found four men who were loyal to her and were ready to die just to keep her safe.In her previous life, she lost her most trusted people, but this time, she was ready to do anything to save them.This time, she was ready to face the apocalypse - stronger and better than the past.* * *Warning: This is a Reverse Harem Romance with mature content.