Krystal is an exhausted university student majoring in architecture. Amber is a new barista in the coffee shop Krystal frequented in for studying.  The two of them enjoy each other's company. No big deal. Krystal inhaling Amber's caffinated scent and Amber savoring Krystal's coffee flavored lips? Inevitable.

f(x)'s Amber and Krystal were best friends, and they were nothing more than that. But one day, after Krystal curiously decided to read fanfiction of herself and Amber, her image of the tomboy had changed unexpectedly. And now, she can't even see Amber's face without thinking about the "Amber" fans have written in their stories