Goodbye 2021, Hello 1987

Hae-jun discovers a time machine while Yoon-young struggles with her busy job until tragedy strikes.

The Reason We Can't Return

Yoon-young thinks that it could be a good thing that she somehow ended up in 1987 and met Soon-ae.

The Secret You Have

Yoon-young joins Soon-ae's class as planned, but a sudden twist drastically disrupts everything.

All This Is a Coincidence?

Hae-jun's expectations are challenged as events unfold, until a student teacher enters the scene.

A Certain Confession

Yoon-young's choice to withhold the specifics of her reasons for staying might have been an error.

Lie After Lie

Despite Hae-jun's confidence in his thorough preparations, it turns out they are insufficient.

An Overlapped Path

Hae-jun and Yoon-young find relief, but their narrow focus may lead to unforeseen consequences.

The Turning Point

The truth dawns on Hae-jun and Yoon-young that they are bound by certain inescapable factors.

Me in Your Darkest Night

Despite grappling with the grief of her sister's death, Soon-ae's primary concern lies with Hee-sub.

Far or Close

With an awareness of how small details can alter everything, Hae-jun directs his attention to Hae-kyung.

Women Who Read Are Dangerous

Not all women who read are dangerous, but the ones around Soon-ae might be a little too dangerous.

A Man Who Doesn't Exist

The complexity of the case deepens as Hae-jun and Yoon-young investigate, causing confusion to mount.

Time Flies, Love Remains

Hae-jun is caught in an unfortunate coincidence, with everything pointing to him as the murderer.

Meeting You Will Bring Me Joy

Hae-jun realizes that investigating the case might have affected someone very close to him.

The Reason You Can't Leave

Looking into the eyes of the culprit who stands staring down at Hae-jun leaves him speechless.

My Perfect Stranger

Farewells exchanged, Yoon-young and Hae-jun journey to meet them again on the other side of the timeline.