- Original title : 제4차 사랑혁명
- Other title: Je 4 Cha Saranghyeokmyeong, The Fourth Love Revolution
- Number of episodes: 8, 1h10
- Broadcast date: November 13, 2025
- Distributor: Wavve
- Directed by Yoon Sung-ho, Han In-mi
- Screenwriter: Song Hyun-ju
- Genre: youth, comedy, romance
- Casting: Kim Yo Han, Hwang Bo Reum, Kwon Young-eun, Heo Jung-do, Im Sung-kyun, Kang sin
Kim Yo-han embodies Kang Min-haka modeling student and rising star on the social networks. He became famous after an acclaimed appearance on a dating show, and now has over a million followers. Charismatic and magnetic, he's a real eye-catcher... but behind this perfect image lies a surprisingly simple, almost naive young man.
At his side, Hwang Bo Reum Byeol lends his features to Ju Yeon-sanfirst in her class in computer engineering. Brilliant, fast and methodical, she is capable of solving the most complex problems. But the slightest mistake and her "system" collapses, revealing its fragility. She has no experience of love, until the day her path crosses that of Min Hak. Their meeting becomes the spark for a romance that could well rewrite her "love algorithm".
A romance of logic and emotion
This romantic comedy tells the story of Ju Yeon-san (Hwang Bo Reum-byeol), a model computer science student, and Kang Min-hak (Kim Yo-han), an influencer and model with over a million followers. Yeon-san's intelligence and scientific rigor shine through, but she completely loses her bearings when a "bug" occurs in her life - especially when it comes to love.
The actress plays a former quiz prodigy turned passionate engineer, capable of solving any problem... except those of the heart. Always surrounded by computers, she has never known love, until her unexpected encounter with Kang Min-hak upsets all her equations.
An original, humorous role
Talking about the project, Hwang Bo Reum-byeol said: "I was immediately attracted by the originality of the script. The director's unpredictable humor Yoon Sung-ho perfectly suits my taste.
She added: "As her name suggests, Yeon-san tries to solve everything with formulas. But after meeting Min-hak, she discovers a new 'parameter' that defies all logic."
The actress also explained that she paid close attention to details of posture and gestures to make her character believable: «It’s
