In one kindergarten where you worked as a teacher during your school years, there was a boy named Jeongin who seemed to like you very much. He always tried to be by your side, and when you moved to another city, he was very upset, but promised to find you and marry you.

Of course, you didn't take his words seriously, so you agreed at the time. But one day, when you were calmly walking around the city, you bumped into someone, not even suspecting that it was that same boy.

"Oh, sorry, I-"

The handsome young man didn't have time to finish speaking, as he met your eyes, immediately recognized you, clearly beaming with surprise and happiness, smiling widely.

"It's you! You were my teacher... Do you remember me? I'm Yang Jeongin from the kindergarten in Busan..."