TV series
Stand to protect it.
With the aid of unexpected friends, a gifted but introverted student confronts bullies and violent foes — unaware of how dangerous his world will become.
Streaming, rental and purchase options
Checked Jul 22, 2026
Weak Hero is available to stream on Netflix and OnDemandKorea in United States. Use the direct links below to open the provider.
With the aid of unexpected friends, a gifted but introverted student confronts bullies and violent foes — unaware of how dangerous his world will become.
Choose an episode, then use the watch options above for the show.
Episode 1
Si-eun is a model student who is always at the top of his school. Because he only cares about his studies, he has no friends at school. Young-bin, a boy in Si-eun's class, is annoyed by Si-eun's cynical attitude. On a mock test day, Young-bin decides to use Bum-seok, a new student, to mess with Si-eun's test.
Where to watch Weak Hero
Episode 2
Young-bin wants revenge on Si-eun for putting him in the hospital by hiring a couple of thugs he knows. Meanwhile, Si-eun gets closer to Soo-ho and becomes friends. Later, Soo-ho comes to Si-eun's rescue when he gets confronted by Young-bin and his thugs.
Where to watch Weak Hero
Episode 3
When Gil-su sees his boys beaten up to a pulp, he gets furious and asks who did it. Young-bin lures Si-eun, Bum-seok, and Soo-ho and takes them to Gil-su. Gil-su threatens them to bring him 15 million won in three days. Si-eun asks Young for advice and information on Gil-su.
Where to watch Weak Hero
Episode 4
Si-eun sees Soo-ho's blood on the floor and calls Young-yi for help. Gil-su tells Seok-dae to come, so Young-yi follows him with her GPS tracking app on. Meanwhile, Soo-ho and Bum-seok are tied up by Gil-su's gang.
Where to watch Weak Hero
Episode 5
While hanging out in a karaoke room with his friends, Bum-seok runs into the bullies from his previous school. Soo-ho makes them apologize, but Bum-seok isn't happy with Soo-ho ordering him around. Si-eun becomes more worried about Bum-seok who seems to be getting more unstable.
Where to watch Weak Hero
Episode 6
Bum-seok befriends with Jeong-chan and Tae-hoon, he reeks of alcohol every day. Si-eun thinks Bum-seok is being used by Jeong-chan and Tae-hoon. He also thinks Bum-seok is behaving that way because he is lonely. Si-eun wants to help Bum-seok, but Soo-ho thinks he's done enough. Meanwhile, Bum-seok pays Woo-young to beat Soo-ho on his birthday.
Where to watch Weak Hero
Episode 7
Si-eun gets beaten up by the guys Bum-seok paid to beat up Soo-ho. Si-eun gets seriously injured, but he doesn't tell Soo-ho about it to protect Bum-seok. Soo-ho finds out later and decides to confront Bum-seok. Bum-seok pays Woo-young again to beat up Soo-ho.
Where to watch Weak Hero
Episode 8
Si-eun and Young-yi get anxious as they can't get hold of Soo-ho for too long. After Si-eun finishes his exams, he hears the shocking news. Meanwhile, Bum-seok's dad tries to make Bum-seok go study abroad.
Where to watch Weak HeroEpisode information updated Jul 22, 2026
Park Ji-hoonYeon Si-eun
Choi Hyun-wookAhn Su-ho
Hong KyungOh Beom-seok
RyeounPark Hu-min
Lee YeonYeong-i
Choi Min-yeongSeo Jun-tae
Yoo Su-binChoi Hyo-man
Kim Su-gyeomJeon Yeong-bin
Netflix
wavveSouth Korea
Playlist StudioSouth Korea
Studio WavveSouth Korea
