A girl who has failed to be accepted by a first-rate university and is suffering from depression, suddenly finds herself pulled into the past. She meets her parents as teenagers and must somehow find a way to spark their romance before she can return to her own time.
| Actor | Role |
|---|---|
 Kim Hee-aeYoung-mi | Young-mi |
| KKim Hye-yeongEun-hye | Eun-hye |
 Lee Yeong-haTae-min | Tae-min |
 Kim Seong-chanJin-woo | Jin-woo |
 Kim Young-aeMs. Han | Ms. Han |
 Nam Seong-hoonDr. Oh | Dr. Oh |
 Kim In-munDirector | Director |
| CChoe Won-seokJang-ho | Jang-ho |
 Kim Su-GyeongEun-jeong | Eun-jeong |
| KKim Hye-seonYoung Eun-mi | Young Eun-mi |
| HHyeon Ji-yeongYoung Eun-jeong | Young Eun-jeong |
| JJang Jeong-juTraffic police | Traffic police |
| SSin Chan-ilPolice 1 | Police 1 |
| PPark Bu-yangPolice 2 | Police 2 |
| JJeong Yeong-juPolice 3 | Police 3 |
 An Jin-sooPrivate tutor | Private tutor |
 Park Jong-seolSecurity guard | Security guard |
 Lee Seok-kuCousin | Cousin |
| JJu Sang-hoOwner 1 | Owner 1 |
| CChoe Jae-hoOwner 2 | Owner 2 |
 Park Yong-palCaretaker | Caretaker |
 Son JunDoctor | Doctor |
| HHong Chung-GilReporter | Reporter |
| OOh Do-kyuFruit vendor | Fruit vendor |
 Han Myeong-hwanMan 1 | Man 1 |
 Nam Po-dongMan 2 | Man 2 |
| HHwang Chun-SuMan 3 | Man 3 |
| KKim I-HoMan 4 | Man 4 |
 Kim Eul-dongSpecial appearance | Special appearance |