The Butterfly Effect

What would you do if you had a chance to make things better?
What would you do if you were given a chance to change?
What would you do if you woke up in your bed one morning and everything that had happened vanished.

He happened to be given every single one of those chanches.
Will he use them right?
Will he be able to stop horrible things from happening again?
Will he end up in the same place without changing anything?

Read to find out.
Yoonmin/Taekook/