导演：CHOI Chang-hwan 최창환
主演：정다민 郭敏圭 金世园
After his mother's death, 16-year-old Hyung-joo suspects that his father is not his biological fathe
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.
“I believe in mathematics. Not only in textbooks, but I believe it can explain the whole uni...
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