After his mother's death, 16-year-old Hyung-joo suspects that his father is not his biological father. A secret paternity test reveals that he is not. Confused, he uses his math skills to figure out his biological father and embarks on a journey with his best friend, Jisoo, to find him.
| Directing | Choi Chang-hwan | Director |
| Editing | Choi Chang-hwan | Editor |
| Sound | Choi Chang-hwan | Music |
| Camera | Jeon Sang-jin | Director of Photography |
| Production | Kam Jeong-won | Producer |
| Production | Kim Ki-hyun | Producer |
| Writing | Kim Ki-hyun | Writer |