: Science teacher Lee Byeong-chan reveals the virus was a desperate attempt to help his son fight back against severe bullying, though it ultimately caused more violence.
: Desperate for information, Cheong-san and Su-hyeok make a dangerous trip to the teachers' office to retrieve confiscated cell phones. : Science teacher Lee Byeong-chan reveals the virus
Reviewers from The Review Geek highlighted the episode's "nail-biting tension" despite it being slightly slower than previous chapters. : Science teacher Lee Byeong-chan reveals the virus
Provide a of what happens in Episode 5.