Weak Hero (Korean: 약한영웅; Japanese: 弱いヒーロー) is a school-action drama about a top student who is physically weak but fights school violence with his brain, together with friends. Starring Park Ji-hoon, Class 1 was followed by Class 2, both streaming on Netflix.
📺 Drama Info
| Works | Class 1 (8 episodes) / Class 2 (8 episodes) |
| Class 2 streaming | From April 2025 (exclusively on Netflix) |
| Genre | School / action / human drama |
| In Japan | Class 1 and Class 2 both on Netflix |
| Note | Contains violent scenes |
👥 Main Cast
- Park Ji-hoon as Yeon Si-eun
- Choi Hyun-wook as Ahn Su-ho (Class 1)
- Ryeoun (Class 2)
- Choi Min-young (Class 2)
- Yoo Su-bin (Class 2)
- Bae Na-ra (Class 2)
📖 Plot (no spoilers)
Yeon Si-eun is a high-school student with top grades and little physical strength. At school he is targeted by Jeon Yeong-bin and is about to be beaten when Ahn Su-ho comes to his rescue.
In Class 2, Si-eun — carrying the trauma of not having been able to protect a friend — stands up to school violence again so that he never loses a friend again.
✨ Three Reasons to Watch
- A "weak" hero who fights with his brain and resolve rather than strength — thrilling and heartwarming
- Park Ji-hoon's straightforward acting, with feelings for his friends showing through an expressionless face
- A story of friendship and growth, not only violence
❓ Frequently Asked Questions
How many episodes does Weak Hero have?
Class 1 has 8 episodes and Class 2 has 8 episodes.
Who stars in Weak Hero?
Park Ji-hoon (Yeon Si-eun), with Choi Hyun-wook in Class 1 and a new cast in Class 2.
Where can I watch Weak Hero in Japan?
On Netflix — both Class 1 and Class 2 (as of October 2026).
Does it contain violence?
Yes. It includes violent scenes, so please take care if you are sensitive.
Based on information as of October 2026. Streaming availability changes — please check each service.