| Kang Shin-Woo is a math teacher with a good looking appearance. He has not forgotten his first love Han Ji-Soo for the past 10 years. By an accident, he travels to the past when he was a high school student. There, he meets his younger self. Kang Shin-Woo struggles to make the younger Kang Shin-Woo's love come true. |
| Name | Character | Episodes |
|---|---|---|
| Go Gyu-pil | Mozart student's Head Teacher | 10 |
| Kim Sun-young | Shin-Woo's mother | 10 |
| Lee Yul-eum | Han Ji-Soo | 10 |