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At Butterfly Hair Salon, apprentice Gi-ppeum struggles to find her place. After an awkward makeover and a string of mishaps, she starts questioning whether becoming a hairstylist is truly the dream she wants to pursue.

Inspired by a heartfelt performance, Gi-ppeum opens up to others. Meanwhile, mysterious men come looking for Mu-yeol, raising suspicion. After learning the truth behind his actions, Gi-ppeum finds herself conflicted.

A blunt customer leaves the salon team flustered. Meanwhile, Su-ri’s kindness causes chaos, creating tension with Jen. When Gi-ppeum is invited to dinner by an old friend, the team bets on a second date. But an unexpected crisis awaits her.

After Mu-yeol’s confession leaves Gi-ppeum shaken, a series of unexpected events leads her to the ER, where Mu-yeol discovers a side of her he never knew.

Gi-ppeum starts a jealousy plan to test Mu-yeol’s feelings, while the Nabi women’s outing takes an unexpected turn. New changes begin between Gi-ppeum and Mu-yeol.

Gi-ppeum and Mu-yeol struggle with misunderstandings as they begin dating, while Michelle worries about her daughter.

Confused about her vague relationship with Mu-yeol, Gi-ppeum seeks advice but no one is able to provide a clear-cut answer. The staff divide into male and female teams to have a team-building session. Amidst chaos and confusion, everyone struggles to tackle their own concerns. Meanwhile, Mu-yeol opens up to Gi-ppeum after contemplating for a long time.

When teenage customers come to Nabi, the staff and regular customers start to talk about kids nowadays. Their talk continues at a staff dinner where they share differing opinions about first loves and dating, and they seem to understand and misunderstand each other at the same time. Meanwhile, Zen is shocked when she sees an unexpected person at the yoga studio she goes to.

The staff of Nabi are surprised by the changes in Gi-ppeum. Meanwhile, everyone is shocked to find that the window of their salon has been vandalized with a shocking claim that one of them used to be a bully. Tensions arise and the staff's opinions are divided. The police start to investigate and Mu-yeol quietly visits someone.

One heavily raining day, Mr. Woo finds what seems to be a customer's suicide note and the staff of Nabi begin to investigate. They each think about what they did to overcome their darkest moments and they try to help the customer using the same methods to no avail. The customer eventually leaves the salon but one staff member chases after them with something to say.

Mr. Woo is attacked by an unidentified assailant and is taken to the hospital. The shocked staff of Nabi testify regarding the crime while Mr. Woo refuses any treatment. Police investigation reveals that the crime was planned. While visiting Mr. Woo in the hospital, Michelle and Su-ri learn about his secret.

When a soon-to-be bride shares her concerns, the staff of Nabi have a debate about whether the past should be hidden or disclosed. When one of Mu-yeol's exes comes as a customer, Zen realizes their relationship and makes a move. Gwang-su misunderstands her behavior and joins her. Feeling uneasy about Mu-yeol, Gi-ppeum makes up her mind and takes Mu-yeol somewhere.

Body weight, happiness, and voice tone are proportionate for Su-ri. However, she eventually blows up in anger at Zen and they finally come into conflict with one another. The interns don't know what to do in this high tense situation. Meanwhile, Gwang-su goes on the first hairdressing business trip and is asked to design the most extraordinary hairstyle.

An old man roams around but runs away when Michelle approaches him. Meanwhile, the staff have many first experiences: Gwang-su is flustered by a change in Zen, Mu-yeol receives a enlistment notice, and Zen is bewildered by some changes in her body. During this confusing time, Mu-yeol asks Gi-ppeum to go on an overnight trip.

A new intern arrives to take Mu-yeol's place! The successor is handsome, good with his work, and is beloved by everyone, and this makes Mu-yeol sad and anxious. Various changes occur after the departure of the seasoned staff member, and the story of Nabi and its regular customers continues.

During a promotional shoot for Nabi a few months ago, Gi-ppeum finds a strange bag while cleaning. It is a highly expensive designer bag! But something unimaginable is in the bag and the staff of Nabi fall into utter confusion. They assume it belongs to a customer and think back on the day. Suspects are ruled out one by one and a mysterious customer pays a visit the next day.