Red Thread of Fate;  According to a myth, the gods tie an invisible red cord around the ankles of those that are destined to meet one another in a certain situation or help each other in a certain way. Chanyeol would soon find out that anything was easier than tying a red string around Kyungsoo's cold heart, but that doesn't stop him from trying any chance he gets.        

Baekhyun gets left alone when Chen leaves for college. 

The one where the boy has a fatal disease and the doctor would do anything to save his life.  Kyungsoo is a home health care nurse. Jongin is a man with an incurable disease.