Unlike Gi-hoon, who is happy running a noodle shop with his mother in their hometown, Ji-eun distances herself from her family due to her ambition to succeed as an idol singer. The siblings, who have been hurting each other more than showing love, find their conflict deepening with the news of their mother's Alzheimer's, whom they thought would stay young forever.
| Actor | Role |
|---|---|
 Kim Jung-nanOh Mi-yeon | Oh Mi-yeon |
 Park Ji-hoonKang Gi-hoon | Kang Gi-hoon |
 Kim Bo-youngKang Ji-eun | Kang Ji-eun |
 Kim Ki-dooHan Deok-soo | Han Deok-soo |
 Kim Yi-kyeongBaek Jang-mi | Baek Jang-mi |
 Ha Si-eunLee Woo-kyeong | Lee Woo-kyeong |
 Lee Pil-moKang Jin-soo | Kang Jin-soo |
 Jang Shin-youngDoctor | Doctor |
 Min Eung-sikBaek | Baek |
 Kim Mi-raDoctor | Doctor |
 Oh Kyung-jooKwon Do-hyung | Kwon Do-hyung |
| JJung Hye-linJung Yoo-ra | Jung Yoo-ra |
| YYoo Ju-haKo Mi-ran | Ko Mi-ran |
 Kim Kwan-moPolice | Police |
| NNamkoong RinHee-jin | Hee-jin |