At first it was jealousy. But maybe, it was love.

Jessica and her boyfriend Jonghyun had been dating for years but until she discovers that he has been cheating on her with Sunny, a friend of his. Obsessed and angry, Jessica breaks up with Jonghyun and stalks Sunny online. At first, she found herself jealous of everything Sunny had accomplished, everything Sunny was. In the long run, she found her feelings morphing into a different kind of emotion. 

Jessica/Jonghyun/Sunny