The four pairs of ex-couples gather at a house in Pyeongchang-dong. They nervously introduce themselves, while secretly studying the faces of their exes. Later, they have a proper chat with each other over dinner. Some seem to be hoping to reunite with their former lovers, but some are ready to find new romance.

Each participant gets the introduction letter that is written by his or her ex. They read the letter out loud with all the participants present. Some of them get emotional and even cry while they read it. After reading the letter from their exes, each ex-couple is given a chance to have an online chat and talk about how they really feel after the break-up.

After the first night, the participants go about their day. They gather again in the evening to have dinner and drinks. They get to learn about each others’ occupations. Later, the female participants pick a card with a keyword on it. They’ll have a date with the male participants who came up with each keyword.

It’s the first weekend since they moved in. The participants enjoy their free time. Later, a letter arrives, delivering shocking news about one of the participants. The participants get a chance to chat with the exes of their dates and learn new things about them.

A new rule gets revealed that one participant’s ex was missing from the start. A new participant makes a sudden appearance at night. In the midst of all this confusion, Gyu-min and Na-yeon go on their date.

The participants get closer through the dates. All of them find out about their ages as well. Hae-eun gets to go on her first date without knowing anything about it.

Hee-doo struggles with his adjustment in the house after an awkward welcome from the others. One of the members helps him get adjusted into the house and the group. New and mixed feelings get revealed between the members after Hee-doo’s arrival.

Two couples go out to date. Some participants put a lot of effort to look good on their dates. The exes who didn’t go on a date get anxious. All the participants gather in the end, and the female participants get to choose who they want to date.

Hee-doo feels upset after seeing Na-yeon. The two express their current feelings with one another. A new room called the Talking Room gets revealed. The female participants get a chance to talk with the ex of the date partner they have chosen.

Everyone except for Tae-i goes on their secret dates. Gyu-min goes on two dates on the same day. This makes him feel a mixture of emotions. The heart-fluttering dates bring the ones on the dates a lot closer and new feelings start to arise.

Hee-doo and Ji-yeon have a secret date, and when Na-yeon finds out, she becomes jealous. The Ex Room, where the participants can reminisce their memories of their relationships, opens for them. For some participants, it’s heartbreaking, but for some, it’s meaningless. Later, they get a chance to talk with their exes one-on-one.

Jisoo X Wonbin, who supported each other's happiness to the X I loved, The first time we had alone The smile that resembled that time suddenly reminds me of the X I loved at the time. peel?

Secret Conversation 'Someone has asked for a secret conversation with you' From X questions that cannot be easily answered, to whether your heart is open to me, a secret but unstoppable conversation between the two of you!

The exes are feeling confused about each others’ feelings. Na-yeon isn’t sure about her feelings after seeing Hee-doo and Ji-yeon’s couple bracelets. Ji-yeon is upset about Na-yeon’s behavior toward Tae-i. On the other hand, Tae-i has a lot of fun on her date with Na-eon. Meanwhile, the participants much choose a partner for their Jeju Island trip.

Jeju-do Nomination Date Nayeon X Hee-doo, who fought even though they pointed out each other, can we forget what happened in Seoul and no longer be entangled in the past? Inconvenient Jiyeon, a strange companion of three people Jisoo X Wonbin, who have had different emotions Now, is it right to say my feelings before it's too late? Speed ​​Up!

Uncomfortable relationship with X The fight between Nayeon and Hee-doo that is still repeated even in Jeju, bringing up the past 'When you see this, we really don't get along' It's sad to see X and other people friendly in front of you. We're not friends." There were only people who couldn't understand and a heart that wasn't understood.

Hae-eun and Hyun-gyu go on a date to ride a fishing boat. Na-eon and Tae-i have a date, making a mirror cover together. Hee-doo and Na-yeon try to talk, but they end up arguing with each other. The next day, participants have a 1-on-1 conversation with the person that they want to talk secretly. They open their hearts and get to know what’s really going on their minds. It helps them to make a new decision.

The participants are given a chance to choose the person they want to go on a date with. However, only those who choose each other can go on a date. Some choose the date they really want, and some make the wrong choice. Later in the evening, they play Truth or Dare to find out how they truly feel.

The participants have one last date with their exes. Hae-eun and Gyu-min have a date that remind them of their old days. Hyun-gyu and Na-eon talk about their honest feelings. Na-yeon becomes certain of the decision she needs to make after a date with Hee-doo. Tae-i also becomes more certain about his feelings toward Ji-yeon.

The day of their final decision has dawned, and they must decide whether they want to get back together with their exes or date someone new. Some have made up their minds, while some are still confused about their feelings. Will Hae-eun choose Gyu-min in the end? Will Hee-doo and Na-yeon get back together? How will Won-bin confess his feelings?

The participants gather in the house one by one. After their brief introduction, where they can only exchange their names and nothing else, they divide into different teams and prepare dinner. After dinner, Breakup Packages are delivered. The items their exes sent are in the package. Meanwhile, Cho Hwi-hyun’s ex is revealed.

The participants were enjoying their dinner when suddenly the doorbell rang. They receive Ex Introduction, an introduction written by their exes. Everyone tears up and gets emotional as they read the introduction out loud. Before the first night passes, they send text messages to the people they become fond of. Will some of them receive a text from their ex?

The participants are told to go on memory fragment dates, in which they will take someone other than their ex to a place that was once meaningful to the broken-up couple. Once the dates are decided, the female participants chat with their dates’ exes and later listen to voice messages left by their exes. Meanwhile, Da-hye and her ex’s story is revealed.

The participants go on their first dates. The male participants take their dates to places filled with memories of their exes. They learn about each other more through their dates, which could bring a change in their hearts. After their first dates, they gather at the house and talk about their day.

The participants reveal their occupations for the first time. After dinner, all of them gather and play Truth or Dare. Some are hurt by what their exes say and end up arguing in secret. Ju-won’s ex is revealed, which surprises all the panellists.

The participants get to find out each other’s feelings through Group Talking Room. They freely ask the questions they had in mind in separate rooms in an altered voice. A new female participant joins the male Group Talking Room, and she chooses a man to go on a date with based on the conversations they had.

For Selected Date, the male participants get to choose their date and have a chance to chat with the date’s ex anonymously. Surprisingly, they all choose the same female participant, which complicates things more. After Ex Chatroom, the male participants are given a chance to change their date. Will they have a change of heart?

The male participants go out for their selection date and use the information gathered in the chatroom. Male and female participants gathered by themselves and talked about their feelings and the changes in their hearts after joining the show. Meanwhile, the last male participant appears. To get to know each other better, everyone gathers and rereads their Ex Introduction.

After the new member, Chang-jin moves in, things change for Da-hye. She goes on a date with Chang-jin the next day, causing Dong-jin to get mixed feelings. Hwi-hyun brings out the candies that Hye-won gave to share with everyone, which upsets her. Yu-jung’s ex gets revealed toward the end of this week’s episode.

Amid the confusion and mixed feelings, the participants continue to find new love. They receive a letter informing them that Personal Rooms are now available for them. They can find new information about their new love interest in the Personal Room. However, Ex-Room, where their memories with their exes are, also opens for them. They must choose between the two. Which room will each participant choose?

Both Dong-jin and Da-hye choose the Ex-Room. Their memories of 13 years fill up the whole room, which shakes them up. Hye-won clears up the misunderstanding she had with Hwi-hyun through a conversation. A new message arrives, and the ladies are told to pick a date for their trip to Jeju Island. If they can’t find a match, they must travel with the remaining participants who failed to find a match.

The participants travel to Jeju Island. The three couples who were matched, Ju-won and Yu-jung, Dong-jin and Hye-won, and Chang-jin and Da-hye, enjoy delightful dates on their own. When all participants gather at the resort, their exes are revealed. After revealing their exes, two new participants join the group.

The participants now have figured out each other’s exes in Jeju Island. Following this revelation, the senders of the incoming texts are also revealed, along with the ex’s choice. The frustration and confusion among them deepen as they are assigned to different rooms and experience changes of heart.

The male participants must choose dates for their exes. They are given 20 minutes to discuss it with their exes, which stirs their hearts. Some end up arguing, while some end their discussion in less than a minute. Everyone expresses their feelings honestly to each other, but some misunderstandings don’t get cleared up.