Time machine

If you are given a chance to return to the past what will you do??

Will you make things right or will you do things that you didn't do when you have the chance

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Kim is lovely and bubbly girl she is the only daughter of Lee family

ACE is cold hearted man and a big snob to anyone

What if they accidently return to the past?
Would they become more close or would they create a huge disaster.