izna are in Busan for their XOXO Trip. They first get explained the rules of the trip: they’ll be traveling by choosing either X or O, and get some missions that will either make them gains coins or choose their next destination. After that, the girls have to accomplish a teamwork test, the "I Came Alone" game. They then get a bonus game where they have to reproduce group photos according to given pose in 30 seconds.

izna get divided into two teams of three members for their first day in Busan: Team Meow Meow Meow, consisting of Mai, Jeemin, and Jungeun, and Team Woof Woof Woof, consisting of Koko, Sarang, and Saebi. The two teams compete in a leg stretching challenge to see which one get to choose their menu. Team Woof Woof Woof gets to enjoy a meal of sashimi then go enjoys the beach of Busan, where they end up getting a challenge called "levitation photo mission", while Team Meow Meow Meow plays a game of "If you go to Busan" before enjoying a meal of cold jelly pork.

Both teams get a different question to decide on the next travel course, which both end up involving to take photos with old-fashion clothes: Team Meow Meow Meow answer lead them to wear retro costumes, while Team Woof Woof Woof get to wear vintage-style clothing. Team Meow Meow Meow then answer a short quiz, before getting another mission, in which the first of the three to reach the top of the 168 stairs gets two coins, they then choose their clothes for the retro time travel photos, and lastly get another question to choose their dinner menu. Team Wolf Woof Woof goes to a vintage clothing store to picks clothes for their photos, which they end up deciding on choosing for each other, and then goes to a leather keyring workshop to create custom leather glove keyring for naya, before getting a mission as well to decide on their dinner meal.

For their dinner, Team Woof Woof Woof goes to a restaurant which particularity is its natural cave, where they also get a mission: avoid getting bitten by the dog guarding the cave. Team Meow Meow Meow enjoys a bunsik four-piece combo and then goes buys gelato before going to the beach, where they get a mission called "sand game". The members then reunite at the accommodation, where they choose their roommates by picking a capsule each, and members who have related words become roommates.

The members make the count on how much coins they each have, before playing their last game for the first day: a zombie game, in which Mai plays the zombie while the other members try not to get caught.

For their second day in Busan, izna get divided in two teams again: Team Dwaeji-gukbap, consisting of Mai, Jeemin, and Sarang, and King Dumpling Team, consisting of Koko, Jungeun, and Saebi. Team Dwaeji-gukbap goes to a zipline location, before getting a mission consisting of predicting if the other will fail or succeed the given challenge. After that, they go eat at a nakgopsae speciality shop, where they get another mission to decide on the next travel course, but before going there, they head to a bakery to eat delicious sweets.

The King Dumpling Team embarks on an emotional healing journey for day two of their trip in Busan, starting with a walk on a coastal walking path with a view of the sea at Huinnyeoul Culture Village while enjoying ice cream, stopping to visit a cute shop where they decide to pick gifts for them as well as for the members of Team Dwaeji-gukbap, followed by another stop to takes photos at a place called "the proposal stairs", before arriving at the observatory, where they get handed a coin acquisition mission. After that, they go eat lunch at a place specialised in burger, and then get asked a question to decide on their next travel course, to which, like team Dwaeji-gukbap, they get the word "garden" for.