Mellangkollia (Melancholia) 1. Sezon 2. Bölüm (Baek Min Jae)

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.