- Director: Namkoong Sun
- Stars: Gong Myung, Shin Eun Soo, Cha Woo Min, Yoon Sang Hyeon, Kang Mi Na
- Country: South Korea
- Type: Movie
- Duration: 1 hr. 59 min.
Set in 1998, the story follows 19-year-old Park Se Ri as she attempts to straighten her perpetually frizzy hair before making a life-changing confession, all while getting entangled with transfer student Han Yun Seok. Experienced in unrequited love confessions, Se Ri collaborates with her friends to team up with Han Yun Seok, a new transfer student from Seoul. Their goal? To carry out “Operation Love” so she can confess her feelings to the school's most popular boy, Kim Hyeon. Many of her subsequent efforts lead to comedic moments that reveal her adorable and lively personality.