The protagonist is taken back to her childhood by a future System called [Work Hard or Die], where she lives out an entire lifetime. Then it sends her to a parallel world, where she transmigrates into herself?!!!
Meow meow meow?
Why would it do that?
The System says people are multifaceted, and every different choice may lead to a different future. As long as you are willing to work hard, the future will turn out well!
Is that really how it works?
Theme: Work hard, and the future will turn out well