Du-su is a mischievous high school student known for causing trouble at school. After one of his pranks leads to a fellow student being ostracized, he publicly apologizes and tries to make amends. Through a series of disciplinary punishments and unexpected responsibilities, he gradually becomes more aware of the impact of his actions and begins helping those around him, including a lonely elderly man and a struggling classmate.
| Actor | Role |
|---|---|
| JJeong Myeong-hyeonNot listed | Not listed |
 Jeong Se-HyeokNot listed | Not listed |
| WWon Po-raNot listed | Not listed |
| SSong Jeong-LimNot listed | Not listed |
| HHong Jeong-huiNot listed | Not listed |