Seok Ji-won and Yoon Ji-won reunite after 18 years, as chairman and gym teacher of the same school.
At a staff dinner, Seok Ji-won makes a bet with Yoon Ji-won over whether the "crazy lilac" will bloom.
Seok Ji-won and Yoon Ji-won meet at the pond where they used to go on dates but get into another fight.
Yoon Ji-won recalls her past with Gong Moon-soo, and Seok Ji-won ruins the inauguration ceremony.
The two families fight over the golf course, while Yoon Ji-won secretly nurses Seok Ji-won's cold.
Yoon Ji-won becomes furious when Seok Ji-won forgets their kiss from the night before.
Seok Ji-won and Yoon Ji-won begin dating and discover old letters and texts they had sent each other.
Seok Ji-won hopes to enjoy a workshop with Yoon Ji-won. He gets anxious by the rumors of Gong Moon-soo.
Seok Ji-won and Yoon Ji-won's relationship becomes public and starts to cause trouble.
Seok Ji-won continues to plan his proposal, but unexpected situations keep getting in the way.
Seok Ji-won uncovers shocking facts about Ji Gyung-hun's corruption.
As it snows on Christmas Eve just like it did 18 years ago, Yoon Ji-won takes a trip down memory lane.
