Season Number: 1
Episode Number: 7
Episode Title: Seung Yoo Returns
Air Date: Dec 1, 2021
Subtitle Language: English
After four years, Seung Yoo has now become a renowned mathematician, and he returns to look for traces of Yoon Su who has disappeared after the incident in 2017. Meanwhile, Principal Noh Jung Ah of Asung High School of Math and Arts proposes an offer to Seung Yoo, and Seung Yoo responds with another offer.