Seasons & episodes
S1 · E1Goodbye 2021, Hello 1987 2023-05-01 · 66 min
Hae-jun discovers a time machine while Yoon-young struggles with her busy job until tragedy strikes.
S1 · E2The Reason We Can't Return 2023-05-02 · 67 min
Yoon-young thinks that it could be a good thing that she somehow ended up in 1987 and met Soon-ae.
S1 · E3The Secret You Have 2023-05-08 · 63 min
Yoon-young joins Soon-ae's class as planned, but a sudden twist drastically disrupts everything.
S1 · E4All This Is a Coincidence? 2023-05-09 · 60 min
Hae-jun's expectations are challenged as events unfold, until a student teacher enters the scene.
S1 · E5A Certain Confession 2023-05-15 · 61 min
Yoon-young's choice to withhold the specifics of her reasons for staying might have been an error.
S1 · E6Lie After Lie 2023-05-16 · 61 min
Despite Hae-jun's confidence in his thorough preparations, it turns out they are insufficient.
S1 · E7An Overlapped Path 2023-05-22 · 60 min
Hae-jun and Yoon-young find relief, but their narrow focus may lead to unforeseen consequences.
S1 · E8The Turning Point 2023-05-23 · 62 min
The truth dawns on Hae-jun and Yoon-young that they are bound by certain inescapable factors.
S1 · E9Me in Your Darkest Night 2023-05-29 · 59 min
Despite grappling with the grief of her sister's death, Soon-ae's primary concern lies with Hee-sub.
S1 · E10Far or Close 2023-05-30 · 60 min
With an awareness of how small details can alter everything, Hae-jun directs his attention to Hae-kyung.
S1 · E11Women Who Read Are Dangerous 2023-06-05 · 61 min
Not all women who read are dangerous, but the ones around Soon-ae might be a little too dangerous.
S1 · E12A Man Who Doesn't Exist 2023-06-06 · 63 min
The complexity of the case deepens as Hae-jun and Yoon-young investigate, causing confusion to mount.
S1 · E13Time Flies, Love Remains 2023-06-12 · 63 min
Hae-jun is caught in an unfortunate coincidence, with everything pointing to him as the murderer.
S1 · E14Meeting You Will Bring Me Joy 2023-06-13 · 63 min
Hae-jun realizes that investigating the case might have affected someone very close to him.
S1 · E15The Reason You Can't Leave 2023-06-19 · 61 min
Looking into the eyes of the culprit who stands staring down at Hae-jun leaves him speechless.
S1 · E16My Perfect Stranger 2023-06-20 · 63 min
Farewells exchanged, Yoon-young and Hae-jun journey to meet them again on the other side of the timeline.