TVXQ! 

A five member boy band that was rulling the charts of Asia once upon a time. After a succesful run for almost 5 years, 2 members had decided to leave the group and disappear to a place where no one can find them, not even their own members. Why did they do that?

18 years later the duo has decided to return to their home. Again, the question why arises.

P.S. The timeline of TVXQ and age of the characters are changed to suit the plot.