Because Yoo Rachel and Lee Hyoshin were too much of a rebel. 

They are tied into another troublesome deal, much more serious.

They're not asked to take some degrees they don't like, nor attend

events they are not interested with. They're lives a lot more free to

be quite honest, but the thing is, the deal turned to be a different.

They're surprisingly married! A marriage full of headaches it is. ☂