Everyone will always carry a mobile phone, and what if this mobile phone has a mobile phone that you can't see has been guarding you? And if he had a chance to take you back in time, would you let him take you there?
When you can see the mobile phone person, when you are still silently missing your ex in your heart, you don't know that the mobile phone person has gradually fallen in love with you. You don't know that, that's why you'll let him take you back to the time before you broke up with your ex, and you really seem to want to change something.
He just took your hand and fulfilled this wish for you.
But you don't know, the mobile phone person helps you fulfill this wish and he will disappear.
You're in tears in retrospective fragments of the past, and you're for your ex. You finally understand that even if time does come again, the fate of you and your ex cannot be changed. You're still going to argue, or you're going to break up.
Just when you understand everything, the mobile phone person slowly disappears in front of you. You can only cry, and there is nothing you can do but cry.
It is only then that you realize that there has always been a person who loves you, even if he knows that you do not love him, he loves you.
If time could do it all over again, would you fall in love with him?