Yoon Su finds out that Seung Yoo solved the question. But he tries to keep a distance from her, saying he doesn’t like math. Yoon Su gives him another math problem, and the problem allows them to connect and communicate. Meanwhile, a math competition is held at Asung High to select the rep student to participate in the International Mathematics Olympics.
Casts:
Lim Soo-jung, Lee Do-hyun, Jin Kyung, Woo Da-vi, Jang Hyun-sung, Byeon Jung-su, Choi Dae-hoon, Baek Ji-won, Kim Ho-jin, Jeon Guk-hyang, Oh Hye-won, Lee Kang-ji, Kim Ji-young, Oh Kwang-rok, Han Gi-joong, Choi Seung-hoon, Jang Gwang, Son Jin-hwan, Jeon Jin-gi, Yang Jo-a, Ahn Sang-woo, Choi Woo-sung, Lee Young-eun