A homeroom teacher of Yosan Private High School has an accident, and thus a substitute comes to fill in. Han Bong-Gu is a mysterious man, and after strange occurrences the class president Ye-Rim tries to get to the bottom of this mystery.
| Creator | N/A |
|---|---|
| Actor | Uhm Ki-joon, Kim So-hyun, Lee Min-hyuk |
| Country | South Korea |
| Production | N/A |
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