My Perfect Stranger: Season 1, Episode 4

1 - 4: All This Is a Coincidence?

With the day drawing closer, Hae Jun experiences mounting anxiety over the possibility of failing to prevent the murder, given his limited information and unexpected developments. While the school is on a field trip, a new student teacher is introduced, whom Yoon Young finds strangely familiar. Later that night, while alone at home, Yoon Young recalls the true identity of the student teacher.