Do you mean TVXQ OR VIXX ?
No,Neo Cultural Technology also known as NCT
I have very little Idea  about  NCT U members  
OH, that's fine. They're divided into 3 sub units so it get easier to know the members
I will try to check Study Record Managers  .  
Sure do. You'll like their music if you love pop.
I have tried studies on MAP . you can check it  it  is  good  . 
Oh sure will check it out. 
I have a little idea about  NCT Alex Hider .  
NCT members are not all Korean. There are Chinese, Japanese and Thai members too. One of their Sub unit WayV produces Chinese and English songs