A past exam question from a prestigious academy submitted by someone is the same as the math grade test taken. Seul-gi heads to the prestigious academy as if possessed. She meets Jae-yi there. Can she trust Jae-yi?

After the class president election, Seul-gi, who has become close to Jae-yi ends up sleeping at Jae-yi's house. Seul-gi wakes up to the sound of Jae-yi's phone constantly ringing, and when she finally opens it, she is shocked!