as Ji Soo-heon, a boy who witnessed the death and acts as a vigilante. Seo Ji-hoon as Seok Jae-beom. Streaming Information
: Soo-heon begins to suspect Chan-mi, especially regarding her claimed lack of familiarity with Park Won-seok.
: Chan-mi learns new information about her brother from Lim So-mi, which paints a shockingly different and more complex picture of his character than she previously believed.
as Ok Chan-mi, a student determined to find her twin brother's killer.