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Season guide

Reunited Worlds: Season 1

40 episodes Premiered Jul 19, 2017 Updated Oct 25, 2026

Reunited Worlds is a 2017 South Korean television series that follows the story of Sung Hae Sung, a high school senior who unexpectedly returns to the lives of his family and friends twelve years after his death. Following a fatal accident, Hae Sung reappears in the world unchanged, remaining an eighteen-year-old boy while his childhood friend, Eom Hyeon Soo, has aged into a thirty-one-year-old woman. This age gap, r

Previously on Reunited Worlds

Season 1 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Sung Hae Sung and Eom Hyeon Soo are childhood friends who were born in the same year.
  • ⚡ A fatal accident twelve years prior to the series resulted in the death of Sung Hae Sung.
  • ⚡ Due to aging in different worlds, Eom Hyeon Soo is now thirty-one while Sung Hae Sung remains eighteen.
  • ⚡ Cha Won Yooung is a chef who is interested in Eom Hyeon Soo.
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Season overview

Reunited Worlds is a 2017 South Korean television series that follows the story of Sung Hae Sung, a high school senior who unexpectedly returns to the lives of his family and friends twelve years after his death. Following a fatal accident, Hae Sung reappears in the world unchanged, remaining an eighteen-year-old boy while his childhood friend, Eom Hyeon Soo, has aged into a thirty-one-year-old woman. This age gap, resulting from the two friends aging in different worlds, creates a complex dynamic as they navigate their reunion. The narrative centers on Hae Sung as he seeks answers regarding the mysterious circumstances of his resurrection and his original death. Throughout the series, which spans forty episodes, Hae Sung is aided by his friends and a chef named Cha Won Yooung, who also holds an interest in Hyeon Soo. Together, they work to right past wrongs and unravel the enigma surrounding Hae Sung's return. The series explores the emotional impact of his reappearance on his broken family and friends, highlighting the challenges of their altered realities as they attempt to reconcile the past with the present while dealing with the strange phenomenon that has reunited them after more than a decade apart.

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Season 1 Episodes

Episode Guide

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Season 1 Progress Shield

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Binge Efficiency Engine

Season 1: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

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Mytharc (4): Crucial lore & season climaxes
Core (36): Character development & subplots
Side Quest (0): Standalone / filler
S1·E1 Mytharc

The Return

Jul 19, 2017 · 28 min

Hae Sung and Jung Won are ordinary high school seniors who are getting themselves ready for life after graduation. One day, Hae Sung wakes up to find everything surrounding him dif

S1·E2 Core

The Accident

Jul 19, 2017 · 32 min

Hae Sung looks for ways to figure out what happened to him when he accidentally runs into his high school friend, Ho Bang. Ho Bang visits Hae Sung's tomb every year with the rest o

S1·E3 Core

How Is He Alive?

Jul 20, 2017 · 29 min

Jung Won is confused and pressured by Min Joon's confession. Hae Sung finds out how his family and friends have been living through Ho Bang, who also tells him that he and the rest

S1·E4 Core

Endless Confusion

Jul 20, 2017 · 34 min

Jung Won takes care of Hae Sung who was injured and lost consciousness. Jung Won thinks she's insane for thinking that Hae Sung has comeback from death. Hae Sung finds out how Jung

S1·E5 Core

Figuring Out the Present

Jul 26, 2017 · 35 min

Jung Won decides to let Hae Sung stay at her place. They spend a good time chatting about their past. The next day, Hae Sung finds a way to help both Jung Won and Hae Chul out of t

S1·E6 Core

Putting the Pieces Back Together

Jul 26, 2017 · 29 min

Jung Won tells Min Joon that Hae Sung is her cousin, which doesn't make Hae Sung happy. On their way back home, Hae Sung and Jung Won decide to have a drink together for the first

S1·E7 Core

In His Place

Jul 27, 2017 · 32 min

Hae Sung finds out from Jung Won that Young Jun wasn't with her on the day Hae Sung died. The police report was recorded falsely and Hae Sung thinks it's strange. Meanwhile, Tae Ho

S1·E8 Core

The Meaning of Family

Jul 27, 2017 · 28 min

Min Joon gets his wrist injured and Jung Won offers to help him. Hae Sung goes over to Min Joon's place and offers to help instead of Jung Won. Meanwhile, Gong Joo disappears from

S1·E9 Core

You Are Not My Brother

Aug 2, 2017 · 35 min

Hae Sung finally meets his youngest sibling, Soo ji. He has met all of them and had a chance to talk to each other except for Young Jun. When Hae Sung visits Young Jun at his hospi

S1·E10 Core

Living Your Dream

Aug 2, 2017 · 31 min

Min Joon helps and trains Jung Won into becoming the main chef of his restaurant. However, Jung Won fails the promotion test and does not make it. Disappointed Jung Won meets up wi

S1·E11 Core

Who Killed Hae Sung?

Aug 3, 2017 · 29 min

Ho Bang tells Hae Sung that the driver who hit Hae Sung with his car was also dead. When Ho Bang visited the driver's funeral home, the driver's wife was saying that he wasn't the

S1·E12 Core

The Fireworks

Aug 3, 2017 · 35 min

Hae Sung finds out that Hae Chul got into a fight in the restaurant because someone accused Hae Sung of being a murderer. Mr. Ahn tells Hae Sung that he gets pain in his chest when

S1·E13 Core

Taking a Hint

Aug 9, 2017 · 32 min

Jung Won gets held up at a hospital because of Min Joon's accident. Fortunately, she makes it to the fireworks festival and meets up with Hae Sung there. Hae Sung feels another pai

S1·E14 Core

The Meaning of Family

Aug 9, 2017 · 33 min

Hae Sung and Jung Won have a drink at her place when all of their friends show up and catch them. Meanwhile, Hae Sung tries to convince his sisters, Young In and Soo Ji, to straigh

S1·E15 Mytharc

Hae Sung's Chest Pain Continues

Aug 10, 2017 · 32 min

Hae Sung gets saddened by the fact that he has to return when his time comes. However, he decides to make the most of his time and looks for the person who murdered him. Ho Bang he

S1·E16 Core

The New Job

Aug 10, 2017 · 31 min

Hae Sung applies for a position at Min Joon's restaurant and he has to come up with a new menu to pass the test. Meanwhile, Seo Won visits Min Joon's restaurant with her colleague

S1·E17 Core

The Guilt

Aug 16, 2017 · 31 min

Jung Won acts awkward in front of Hae Sung because she was reminded of the time she suffered because of his death. She feels guilty as she thinks it's all her fault that things tur

S1·E18 Core

The Culprit in the Room

Aug 16, 2017 · 34 min

Hae Sung and Jung Won find out how they feel about each other and kiss for the first time. They go on a trip together and make memories that they couldn't have over the past years.

S1·E19 Core

Why Did You Kill Me?

Aug 17, 2017 · 33 min

Hae Sung faces the culprit who's been causing a pain in his chest. It turns out to be Tae Hoon's father, Gwon Pyo. Gwon Pyo feels pressured as Hae Sung and Ho Bang are narrowing do

S1·E20 Core

You Don't Have Evidence

Aug 17, 2017 · 29 min

Gong Ju's mother visits Hae Chul, but Hae Chul tells her to leave them alone. Min Joon's uncle turns out to be the driver who is known as the culprit, and Min Joon has the evidence

S1·E21 Core

A Big Shock

Aug 23, 2017 · 31 min

Hae Sung is in big shock after hearing who the real culprit behind the murder was. Min Joon tries to bring the truth into light with his aunt’s testimony, but he’s put in more dang

S1·E22 Core

Disappearance

Aug 23, 2017 · 34 min

Hae Sung passes out in the middle of nowhere so no one can find him. Hae Sung is out of touch for a while and Jung Won gets really worried about him. He tries to make up for the ti

S1·E23 Core

Cha Pasta Food Truck

Aug 24, 2017 · 34 min

Hae Sung and Min Joon start of their new business, the “Cha Pasta Food Truck”. Their food truck becomes a hot issue on social network media by a chance. Meanwhile, Jung Won submits

S1·E24 Core

Report on the Murder Case

Aug 24, 2017 · 30 min

Hae Sung tries to cover up the truth behind the incident which took place twelve years ago. He tries with all his might for Young Jun. However, Ho Bang receives a call reporting th

S1·E25 Core

A New Witness

Aug 30, 2017 · 29 min

Hae Sung finds out Min Joon is the son of Chairman Cha Gwon Pyo and that he's half brother of Tae Hoon. Meanwhile, an anonymous calls Ho Bang to report on what he saw on the day of

S1·E26 Core

It's More Complicated

Aug 30, 2017 · 36 min

Min Joon realizes that his dad killed Hae Sung twelve years ago and he feels apologetic towards Jung Won. Tae Hoon wants to tell Hae Sung how he feels about Young In and get his ap

S1·E27 Core

The Mysterious Ties

Aug 31, 2017 · 30 min

Moon Sik turns out to be from an affluent family and all his friends feel somewhat betrayed. Ho Bang finds out there's a link between Tae Hoon's mother and the art teacher, Ms. Hyu

S1·E28 Core

The Truth

Aug 31, 2017 · 34 min

Hae Sung tells Min Joon the truth about his identity and asks for his forgiveness. Ho Bang keeps tracking down Hyun Kyung Eun to find out about Hae Sung's death. Meanwhile, the new

S1·E29 Core

The Business Trip

Sep 6, 2017 · 29 min

Tae Hoon's father, Gwon Pyo, finds out that Tae Hoon is dating Young In and gets furious. Gwon Pyo tells Tae Hoon to stop seeing Young In. Ho Bang traces Park Dong Seok and finds o

S1·E30 Core

Don't Marry Her

Sep 6, 2017 · 32 min

Hae Sung sees himself disappear in front of a mirror and gets scared that his day is coming. He shares that story to Ms. Do and she tells him to get prepared for the day he leaves

S1·E31 Core

Let's Break Up

Sep 7, 2017 · 29 min

Hae Sung realizes that Tae Hoon could be the culprit behind the murder after talking with Young Jun. Tae Hoon's mother goes and sees Young In to tell her that she doesn't deserve T

S1·E32 Core

The Truth

Sep 7, 2017 · 31 min

Young In tells Tae Hoon that she wants to stop seeing him. Hae Sung hears what happened between them and gets heartbroken that the two of them can't overcome the difference. Tae Ho

S1·E33 Core

The New Hopes

Sep 13, 2017 · 31 min

Jung Won tells Hae Sung that she never celebrated her birthday ever since Hae Sung died. Hae Sung felt bad after hearing this, so he wants to make her wishes come true. Tae Bok lea

S1·E34 Core

Is Tae Hoon the Real Culprit?

Sep 13, 2017 · 28 min

Hae Sung picks the location where he will open his new restaurant with his brother, Hae Chul. Tae Hoon tells Hae Sung what exactly happened on the night Hae Sung was killed. After

S1·E35 Core

Coping with the Reality

Sep 14, 2017 · 30 min

Jung Won accidentally watches the video that Hae Sung's been recording and finds out that Hae Sung has to return soon. She seeks for a word of advice from Ms. Do who has a similar

S1·E36 Core

Narrowing Down the Suspect

Sep 14, 2017 · 29 min

Dong Seok feels threatened as he realizes that Ho Bang is looking for him and wants to run away to the States with Yoo Min. Yoo Min refuses to go without Gong Joo. Hae Chul manages

S1·E37 Core

There's No Match for Her

Sep 20, 2017 · 31 min

Jung Won accepts the fact that Hae Sung might have to return one day and decides to make the best out of the days left. Hae Sung finds out that Soo Ji is in need of a transplant, s

S1·E38 Core

Catching the Real Culprit

Sep 20, 2017 · 29 min

Sung Jun pulls off his wedding because he can't stand lying to Seo Won anymore. He decides to donate his kidney to Soo Ji and he makes up with his siblings again. Meanwhile, Hae Su

S1·E39 Mytharc

Clearing Hae Sung's Name

Sep 21, 2017 · 31 min

Dong Seok takes Gong Joo to a bus terminal and sends her off to Busan by herself. When Yoo Min and Hae Chul find this out, they chase the bus Gong Joo got on and saves her. Meanwhi

S1·E40 Mytharc

Life Without You

Sep 21, 2017 · 28 min

Hae Sung's name is finally cleared and he goes on a trip with all his siblings where he says goodbye. Before Hae Sung takes off, Jung Won's book gets published. Hae Sung is relieve

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