Episode 1
Fermat’s Last Theorem
At Asung High, Yoon Su’s new workplace, she gives a tricky question for students who want to join the math clu...
Episode 2
Baek Min Jae
Yoon Su finds out that Seung Yoo solved the question. But he tries to keep a distance from her, saying he does...
Episode 3
Infinite and Finite
Seung Yoo participates in the math competition and is picked to represent Asung High along with Ye Rin. The re...
Episode 4
The Ten-Year-Old Genius
Seung Yoo and Ye Rin prepare in earnest for the Math Olympics. Jung Ah and Min Jun teach Ye Rin the means to w...
Episode 5
Faulty Brakes
After the Math Olympics, Seung Yoo opens up and tells Yoon Su the traumatic experience he had bottled up insid...
Episode 6
The Midterms
Yoon Su gets overwhelmed with mixed and complex emotions after hearing Seung Yoo profess his love for her. Gyu...
Episode 7
Seung Yoo Returns
After four years, Seung Yoo has now become a renowned mathematician, and he returns to look for traces of Yoon...
Episode 8
Seung Yoo’s Project
Now that he has reunited with Yoon Su, Seung Yoo tries to get close to her again. Noh Jung Ah, who doesn't kno...
Episode 9
Unlocking Yoon Su’s Heart
Seung Yoo tries to bring Yoon Su out into the world from her rut by getting close to her heart, just the way s...
Episode 10
The Audit
For the first time, Yoon Su reveals to Seung Yoo her pain and suffering. Seung Yoo discovers the person behind...
Episode 11
Face to Face at Last
Yoon Su starts to smile little by little thanks to Seung Yoo, and the two of them have an enjoyable and memora...
Episode 12
Flawed Premise
Seung Yoo announces that he was the student involved in the teacher-student love scandal at Asung High and sho...
Episode 13
A Place Of Warmth
Seung Yoo understands the error in the premise and Yoon Su deeply. He becomes frustrated because his love for...
Episode 14
Asung’s New Director
Seung Yoo and Yoon Su finally reveal the truth behind the scandal that happened in their past. While Noh Jung...
Episode 15
Ji Na’s Guilt
Yoon Su and Seung Yoo hold hands for Si An, supporting, relying on, and moving together. In the end, they get...
Episode 16
Noh Jung Ah’s Collapse
Finally, Seung Yoo and Yoon Su reveal the secrets behind Asung Academy and Noh Jung Ah to the world. How will...