The Hidden Corner was a suspense novel about crime and psychology, in which all the children were portrayed as people with character defects and criminal behavior. Their actions and motives were very complicated and had to do with their age and background. Although some of them had committed serious crimes, others had made the wrong decision out of ignorance or impulse. Throughout the novel, the author portrayed the children's personalities, growth, and relationships to show a complex social reality and the various problems and contradictions that existed in it. Therefore, we can't simply paint these children as 'bad' people. Instead, we should look at the complexity and long-term effects behind their actions.