It was Sungmin who invented Kyuhyun’s nickname. His reason: Kyuhyun’s too long and too serious when it sounds unlike KYU~~~, which is better, much friendlier and sounded so, so, so adorable. 
 

“Kyuhyun,” Kyuhyun retorted as they lie near each other at their shared bedroom. 
 

“Kyu,” Sungmin answered nudging and playing with Kyuhyun’s hair. 

“But I’m Kyuhyun.” 
 

“Kyu sounds adorable.” 
 

Kyuhyun ‘hmped’ and hid his face, nuzzling to his pillow and ignoring all the sweet and light touches from the older man. Kyuhyun cursed the soon to be nickname of his. 

But then he heard the sweetest, angel-like voice he had ever heard in his life. 

“Kyu…” Sungmin chirped alluringly and Kyuhyun can’t help but look at the older guy and smile.