At Asung High, Yoon Su’s new workplace, she gives a tricky question for students who want to join the math club. Whil...

Yoon Su finds out that Seung Yoo solved the question. But he tries to keep a distance from her, saying he doesn’t lik...

Seung Yoo participates in the math competition and is picked to represent Asung High along with Ye Rin. The result sh...

Seung Yoo and Ye Rin prepare in earnest for the Math Olympics. Jung Ah and Min Jun teach Ye Rin the means to win, and...

After the Math Olympics, Seung Yoo opens up and tells Yoon Su the traumatic experience he had bottled up inside of hi...

Yoon Su gets overwhelmed with mixed and complex emotions after hearing Seung Yoo profess his love for her. Gyu Yeung ...

After four years, Seung Yoo has now become a renowned mathematician, and he returns to look for traces of Yoon Su who...

Now that he has reunited with Yoon Su, Seung Yoo tries to get close to her again. Noh Jung Ah, who doesn't know that ...

Seung Yoo tries to bring Yoon Su out into the world from her rut by getting close to her heart, just the way she help...

For the first time, Yoon Su reveals to Seung Yoo her pain and suffering. Seung Yoo discovers the person behind their ...

Yoon Su starts to smile little by little thanks to Seung Yoo, and the two of them have an enjoyable and memorable tim...

Seung Yoo announces that he was the student involved in the teacher-student love scandal at Asung High and shocks eve...

Seung Yoo understands the error in the premise and Yoon Su deeply. He becomes frustrated because his love for Yoon Su...

Seung Yoo and Yoon Su finally reveal the truth behind the scandal that happened in their past. While Noh Jung Ah puts...

Yoon Su and Seung Yoo hold hands for Si An, supporting, relying on, and moving together. In the end, they get close t...

Finally, Seung Yoo and Yoon Su reveal the secrets behind Asung Academy and Noh Jung Ah to the world. How will Noh Jun...