Episode 2
S1, E2: Yoon-su finds out that Seung-yoo solved a tricky math problem; Asung High organises International Mathematical Olympiad in order to select a student representative; Yoon-su puts Seung-yoo in detention.

S1, E2: Yoon-su finds out that Seung-yoo solved a tricky math problem; Asung High organises International Mathematical Olympiad in order to select a student representative; Yoon-su puts Seung-yoo in detention.