11 months ago, the entiry Seoul High were shocked when the principal's daughter, Lee Hayi chose to confess to an ordinary scholarship student, Kim Hanbin whom no one paid attention to before.

The latter himself couldn't believe it. He didn't love the girl but he knew the decision to reject her was not a good one to make. He wouldn't want to be hated by the entiry school especially by the principal himself. Without much thought, he accepted her to be his girlfriend.

Everything seems fine for the past few months. Hayi's cute and caring personality made Hanbin fall yet he'd never said those three precious words to her. Hayi knew this but she didn't want to make it a big fuss for she knew her boyfriend lacks in showing affections and not a chessy type guy.

Untill one day - a month before their first anniversary, Hayi stumbled upon him and an unknown girl, having a dinner together at her favourite restaurant. She couldn't help but felt suspicious and she started to doubt about Hanbin's feeling for her.

Did Hanbin really cheated on her?

Who's that unknown girl?

Will their relationship survive?