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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.
Hong Jong-hyun
Min Ho-soo
Park Ji-yeon
Seo Yool
Lee Joon
Ahn Ba-woo
Shin So-yul
Lee Ra-yi
Kim Bo-ra
Yoon Gong-ji
Yoon Hee-seok
Jung In-woo
Jung Woo-yeon
Jeong Yoo-mi
Go Kyung-pyo
Bong Il-tae
Jung Kyung-ho
Min Chan-ki
Nam Hyun-joo
Ho-soo’s mother
Jeong Man-sik
Ba-woo’s father
Jeon So-min
Ba-woo’s date
Lee Il-hwa
Ra-yi’s mother
Jo Jae-yun
P.E. teacher