It's Easy to Say Goodbye, but It's Hard to Say Goodbye

This is a campus love story that is more than friendship, but not yet lovers. How long exactly ten years is? It seems that the difference is only a number from 2010 to 2020, but it also seems like a world away. Now when I think back to what happened ten years ago, that scene seems like a dream with dazzling lights and shadows, so clear and yet so shadowy.