The cure became a seed of conflict, splitting the students into two teams: Jeong Yeseul and those who follow her, and Kim Junho and those who follow him.

Kim Junho's group leaves Dormitory Building A to infiltrate the laboratory, presumably to seek revenge on Dr. Queen, while only Jeong Yeseul's group remains at the dormitory.

Back in the summer when the internal division began, Kim Junho, fed up with the friction between Jeong Yeseul and the other students, finally left the dormitory to join forces with Ma Yonggyu's group.

Nam Dongjin, who could only watch, told him to come back if things got too hard, but he couldn't stop him from leaving.

And so, about four months passed, and the students welcomed winter. Still unable to escape the school.