If I Could Do It Again

People who have regrets in the real world can enter a system through dreams, where they can start over the places and things they regret most, and from then on, everything in the system will be the same as the real world, just like the real world in the mirror. People can enter the system while sleeping in reality, and they also have to sleep in the system to return to the real world, but this will not affect people's rest. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.