A copy of Seul-gi's essay, the only one to receive an A+, is found in a drawer of a classmate's desk, and Jae-yi gets upset and tells her not to let anyone read it, but for some reason Seul-gi doesn't seem to care.

Seul-gi, who became the top student in the entire school along with Jae-yi, is suddenly threatened by Byeong-jin and is worried that drugs will be detected during the health checkup. Seul-gi approaches Jae-yi, who calls her up to the rooftop.