Season 4

1. Please, Take Good Care of Him

2. A Breakup Locked in a Closet

3. Sweet and Bitter Moments

4. Passing Carelessly

5. Restless Night

6. The Speed of Breakup Depends on the Person

7. The Door Opens

8. Insincere Love

9. Misunderstanding is Easy, But Understanding is Hard

10. Our Nights Shine Brighter Than the Day

11. You, Back Then

12. A Different Time

13. Leaving This Night In Seoul

14. X’s X

15. The Time I Thought I Had Forgotten

16. Farewell Caught in My Throat

17. A Way To Keep You With Me

18. A Sleepless Night, and the Rain Falls

19. A Summer Night of Regret

20. So, It's Goodbye, Then

21. Again, Never

22. The Untold Story