The Weak Hero (Yakhanyoungwoong) revolves around Yeong Si In, an exemplary student who always receives top grades and ranks in the top 1% of his school. Despite his physical weakness, he is forced to confront violence both within and outside the educational institution. In this school, teenagers live by the laws of the jungle, making life difficult for our hero. However, using his high intellect, analytical abilities, and extensive knowledge, Yeong Si In overcomes challenges and successfully stands up against violence.