The kind of noises that Kangin found annoying are the noises caused by Shindong. 

Seohyun was very sickly so she felt lonely because people feared that they might catch whatever illness or disease Seohyun currently had or they do something that would cause Seohyun to another hospitalization or death.  Things changed when she met Yesung.  Finally, there was someone who isn't afraid to be with her.

  Siwon was an immortal who doesn't mind looking old because unlike most immortals, he isn't interested in trying to look young and handsome.  He is very much happy to befriend a child named Shindong.  

How Shindong and Eunhyuk are time conscious in different ways.  Frienship fic!  

Siwon's family lived in America but it had been their tradition to go back to Korea every summer.  That is how Siwon met his summer friend, Kangin, but when they reached the age of high school, Siwon wanted a bit of freedom from his parents and opted to stay in America instead of going back to Korea with his family.  Three summers past by, Siwon didn't go to Korea and then finally on Christmas break, Siwon decides to go by himself but will he able to rega