In a universe that Hankyung is an assasin and Heechul was his target. When they have fallen in love and gotten hurt in the process, there rise uncertainty.  Inspired by:  Concrete Angel- Christina Novelli

[Breathe] I can't breathe. I can't breathe. I can't breathe... [Only When You're Lonely] When he heard his voice, everything he taught myself to fight temptation erased itself and he was trailing after him like a lost puppy. [Jealousy] Love me...because I was here first.

The first stage--it was a coincidental meeting. No one would've expected anything from it. The second stage--from another coincidental meeting, a new friendship was formed. The third stage--change was evident form this point on. What both of them had never expected, happened. And it was acting fast. The final stage--there's no stopping it now. Once you've reached here, the only option left is to...die.