Melancholia (2021)

S1E7 Seung Yoo Returns

Four years later, Seung Yoo has established himself as a prominent mathematician and embarks on a quest to find Yoon Su, who vanished following the events of 2017. During this time, Principal Noh Jung Ah from Asung High School of Math and Arts extends a proposal to Seung Yoo, who counters with an offer of his own.