A popular high school student, who is the top student of her class, mysteriously dies. Six of her friends who graduated from the same elementary school attempt to track down the reasons for her death. While the six friends try to find the truth behind her death, they struggle with teenage hardships and academic pressures.
Min Ho-soo
Seo Yool
Ahn Ba-woo
Baek Hyo-ahn
Lee Ra-yi
Yoon Gong-ji
Lee Sang-yong
Yoo Yeo-jin
Jung In-woo
Bae Tae-rang
Jeong Yoo-mi
Bong Il-tae
Min Chan-ki
Speaker
Ho-soo’s mother
Ba-woo’s father
Ba-woo’s date
Ra-yi’s mother
P.E. teacher
Teacher