After his mother's death, 16-year-old Hyung-ju 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, Ji-su, to find him.
- Created by
- Choi Chang-hwan
- Origin
- KR
- TMDB rating
- 6.0 / 10 · 1 vote
