Now, imagine this.

Eunjung is a highschool classical literature teacher that is well respected from her students. A perfect person, you'd say. Taller than average, extremely pretty, and incredibly smart. . there HAS to be NOTHING wrong with her.

Physically no.

Mentally yes.

She still grieves the day that Park Jiyeon's older sister has died, 14 years ago. They were best friends, something you'd call a miracle friendship. Eunjung used to always go to her friend's house to hang out and help Jiyeon with homework. Jiyeon would always childishly reject her assistance, but would enjoy playing with Eunjung after doing her homework. That memory is long gone now.

She didn't see it coming, but 14 years after the incident . , Eunjung sees that Jiyeon is now one of her students. She can't help it, but be taken aback by how strong Jiyeon's appearance resembles her deceased sister.

Getting confused whether it's Jiyeon or her older sister, Eunjung decides to push Jiyeon away and think of her as only just a student and a person she never knew before. This only enrages Jiyeon, fully knowing how their friendship was back then and how her sister's death affects it. Jiyeon decides to become one of those students that act like pricks to their teachers. . . just to spite Eunjung.

When will Eunjung realize that it's time to acknowledge Jiyeon as an old friend ?