There is Hyukjae and there is Eunhyuk. Depending on who you meet first, you might get the wrong impersonation of the real one, who is that, you may ask? You won't know. 
Hyukjae is your quiet guy who hates company but can't stand to be alone, he sufferes from not only multiple personality disorder  but dependent personality disorder as well. He cans aswell. He is a sweet and innocent guy however, when someone treats him right.

Eunhyuk however is the complete opposite. he is always doing something to cause trouble, sleeps around and does drugs. Making Hyukjae seem bad from the start.  However when he is around people that he knows well enough, he likes to joke around and pull pranks.  

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the precious people i spend my money on