Episode 1

Seok Ji-won and Yoon Ji-won reunite after 18 years, as chairman and gym teacher of the same school.

Episode 2

At a staff dinner, Seok Ji-won makes a bet with Yoon Ji-won over whether the "crazy lilac" will bloom.

Episode 3

Seok Ji-won and Yoon Ji-won meet at the pond where they used to go on dates but get into another fight.

Episode 4

Yoon Ji-won recalls her past with Gong Moon-soo, and Seok Ji-won ruins the inauguration ceremony.

Episode 5

The two families fight over the golf course, while Yoon Ji-won secretly nurses Seok Ji-won's cold.

Episode 6

Yoon Ji-won becomes furious when Seok Ji-won forgets their kiss from the night before.

Episode 7

Seok Ji-won and Yoon Ji-won begin dating and discover old letters and texts they had sent each other.

Episode 8

Seok Ji-won hopes to enjoy a workshop with Yoon Ji-won. He gets anxious by the rumors of Gong Moon-soo.

Episode 9

Seok Ji-won and Yoon Ji-won's relationship becomes public and starts to cause trouble.

Episode 10

Seok Ji-won continues to plan his proposal, but unexpected situations keep getting in the way.

Episode 11

Seok Ji-won uncovers shocking facts about Ji Gyung-hun's corruption.

Episode 12

As it snows on Christmas Eve just like it did 18 years ago, Yoon Ji-won takes a trip down memory lane.