Life is so unpredictable. People tend to think that they have it all planned out, but at certain point, their 'plan' needs to change because of some circumtances. They can't avoid. They just have to wait and see before starting again to plan their life.

That's what happen to Jihyo right now. She lived a simple life for 31 years, being a good daughter to her parents, a charismatic teacher to her students, a role model to her siblings and many more of good points which can relate, but when there's a sudden change came crushed into her life, Jihyo stumbled.

What had happened? How can this happened? What she would do? She had all the questions in her mind the moment she learned that she's actually engaged with a young bachelor and her parents just decide to drop the news recently.

They told about the agreement between the two grandparents, who appeared to be good friends for decades. In order to not cut off their relationship, their grandpa agreed to match their first grandaugther with their last grandchild.

Well, Jihyo is happened to be their first grandaughter in the family, and also the soon unlucky bride. While, her fiance? Jihyo thinks she can accept these whole marriage agreement if her fiance to be someone who is older than her, or at least in the same age, but her hope is literally ruined once again after she was told that her fiance is still in his last year of high s