Description:

Choi Kang is really a soft-hearted guy, despite his completely opposite looks. He is determined to make friends at school, but Haessal wrongfully gets the impression that he's a bully. Kang's online friend "Bada-nim" consoles him, as he tries to clear up the misunderstanding. Will he succeed? And what will happen to him and Haessal? (Source: Hour of Lunacy)

Alternative Titles:

The Sunshine Powerhouse, Choi Kang, Just Like HetSal, Strongest, Just Like Sunshine, Choegang, Haetsalcheoreom, 猛男的烦恼