What would you do if you met your older self, who came from another dimension, and told you "you’re pathetic"? He tells you that your best girl friend (or is it his girl) will die in order to save you and the entire world in the future and you cannot do a thing about it.
Would you believe him or laugh it off as a joke? Hurry up, no time to doubt yourself when the world is disappearing right before your eyes!!