Taeyeon Tiffany Jessica Yuri Sooyoung Yoona
Taeyeon has English lessons with Tiffany in Columbia University:) Jessica, Sooyoung, Yoona and Yuri will also be students.
Tiffany is Taeyeon's senior in Columbia University, where Taeyeon has just been accepted to read medicine. Tiffany is a second-year student who has been assigned to help Taeyeon study English. They get closer as Taeyeon has private tutoring sessions with her, due to her weak English foundation.