In this dramatic series about shared lives and enduring memories, a circle of friends from high school gather for their 15-year reunion.

1. Episode 1 38m In the present, Shi Won reunites with her classmates and reminisces about high school in the 1990s.

2. Episode 2 31m Shi Won is furious and stops talking to Yoo Jung after finding out that she's a Sechs Kies fan.

3. Episode 3 39m Hak Chan, a new transfer student from Seoul, makes friends with the gang but inexplicably keeps his distance from the girls.

4. Episode 4 35m When everyone gathers at Shi Won's house to watch a soccer game, Yoon Jae becomes jealous of her chumminess with Joon Hee.

5. Episode 5 35m After faking injuries from a car accident, Shi Won's father is admitted to the hospital -- where he receives a shocking diagnosis.

6. Episode 6 45m Yoo Jung uses Hak Chan in an attempt to make Yoon Jae jealous, but the plan backfires.

7. Episode 7 42m To prepare his students for college, Tae Woong helps them figure out their life goals and dreams.

8. Episode 8 48m As the day of college-entrance exams arrives, it brings life-changing experiences for everyone.

9. Episode 9 41m The love story of Shi Won's parents is brought to light, revealing a family connection between Yoon Jae and Tae Woong.

10. Episode 10 56m Joon Hee finally musters the courage to profess his love for Yoon Jae.

11. Episode 11 39m Shi Won questions the nature of her friendship with Yoon Jae after he shows great concern for her safety during a frightening nighttime walk.

12. Episode 12 53m Misunderstandings and confessions cast a dark cloud over Shi Won and her friends as they prepare for life after high school.

13. Episode 13 56m A tragedy in Yoo Jung's family brings the old group back together, reigniting feelings they've all tried to forget for six years.

14. Episode 14 47m Joon Hee chastises Yoon Jae for avoiding Shi Won for the past six years. Meanwhile, Tae Woong is shocked when he overhears a conversation.

15. Episode 15 54m Yoon Jae rejoices in his relationship with Shi Won but is thrown into confusion when he's challenged by Tae Woong.