Weak Hero Class 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-euns class, is annoyed by Si-euns cynical attitude. On a mock test day, Young-bin decides to use Bum-seok, a new student, to mess with Si-euns test.

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.

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 isnt happy with Soo-ho ordering him around. Si-eun becomes more worried about Bum-seok who seems to be getting more unstable.

Si-eun gets beaten up by the guys Bum-seok paid to beat up Soo-ho. Si-eun gets seriously injured, but he doesnt 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.

Still affected by what happened to Su-ho, Si-eun withdraws from others. Seo Jun-tae contemplates taking a stand against the bullies — despite the risks.

While doing volunteer work as punishment for fighting, Si-eun begins to form a bond with new friends — but trouble continues to find him.

Worried for his father and backed into a corner, Hu-min confronts Baek-jin. Si-eun considers studying abroad after clashing with his distressed mother.

As Si-euns absence leaves a gap, Baek-jin presses on with his violent mission. In response, Hu-min rallies his school and challenges him to a showdown.