Luhan's front door slammed shut in Sehun's face six year earlier at the end of their relationship.  Sehun thought that was the end of it.  But then, six years later, that door is open again.  This time though, when Sehun walks in, everything is not the way he left it. 

He was in darkness.  All he saw was darkness.  Everywhere, all the time.  Dark.  The car accident left him sightless, and Luhan didn't know what to do with himself.  But as he feels his life start to crumble around him, there's a light shining in the dark.  He may not be able to see her, but he does know her voice.  He knows her touch.   His wife.   She becomes his life