Chapter 1: Isa's New Beginning
Isa, a shy young girl with a passion for makeup, starts a new chapter in her school life. After being bullied in her previous school due to her looks, she reinvents herself in a new high school, using makeup as her shield. There, she meets Suho, an attractive yet reserved student, and Seo Joon, a popular guy with a rebellious edge. Isa also becomes friends with Jugyeong, a sweet girl who quickly becomes her confidante. Even though Isa hides her bare face, Suho seems to see something beyond appearances.
Chapter 2: Hidden Faces
In art class, Isa is paired with Suho. During the activity, he notices something familiar about her without makeup. Meanwhile, Seo Joon starts to show interest in Jugyeong, causing tension between the boys. Isa feels torn between her fear of being discovered and her growing feelings for Suho. Jugyeong encourages her to trust what's inside, not just her looks.
Chapter 3: Half Truths
Isa becomes more comfortable with her new friends, but an old enemy, disguised as an anonymous student, threatens to reveal her past. Suho accidentally finds a photo of Isa without makeup, but instead of turning away, he shows her compassion. Meanwhile, Seo Joon slowly falls for Jugyeong.
Chapter 4: Facing the Past
Isa's rival launches an anonymous social media campaign to shame her. With the support of Suho, Jugyeong, and Seo Joon, Isa gives a heartfelt speech to the entire school, revealing her truth and how she learned to value herself. Isa's honesty inspires others, and Suho openly confesses his love for her.
Chapter 5: Rainy Day Confessions
A school outing ends in a downpour. Isa and Suho, soaked, take shelter under a small kiosk where they finally share their first kiss. At the same time, Jugyeong and Seo Joon have their first romantic moment on the beach. Though new rivals emerge, the bond between both couples grows stronger.