Jessica and Onew are best friends since they were in gradeschool. They were classmates since 1st grade until they graduated. Onew grew up to be good looking, having an awesome appeal with that y smile of him, and of course with this characteristics, he have tons of girls around him. While, Jessica on the other hand, grew up to be gorgeous and y, she had a lot of suitors but she didn't accept any of them for one good reason, she's waiting for Onew. But for some reasons, she felt like giving up on him. He always use her to be pretend girlfriend, fiancé and they even came to the point to pretend that they are married. But then, when she met Jonghyun—One of Onew's colleagues—and asked her to go out, Onew shows possesivenes...or should she call it JEALOUSY?