A seventeen-year-old girl with sun allergy lives a sheltered life. One night, she ventures out to play guitar, and she meets a guy she admires. As they develop a romance, she hides her condition from him, creating tension in their budding relationship.
| Actor | Role |
|---|---|
 Jung Zi-soLee Mi-sol | Lee Mi-sol |
 Cha Hak-yeonKim Min-jun | Kim Min-jun |
 Jung Woong-inLee Gwang-gil | Lee Gwang-gil |
 Jin KyungKyung-sun | Kyung-sun |
 Kwon Han-solCho Ok-kyung | Cho Ok-kyung |
 Nam Myung-ryeolDoctor Hwang | Doctor Hwang |
 Song Chang-gyuMerchant 1 | Merchant 1 |
 Jin Yong-ukMerchant 2 | Merchant 2 |
 Kim Joo-hwangMerchant 3 | Merchant 3 |
 Yun Bu-jinNeighbor Woman | Neighbor Woman |
 Jung Min-jooMiddle School Student | Middle School Student |
 Park Sang-hooAssistant Director | Assistant Director |
| KKo Hoon-mokDesignated Driver | Designated Driver |
 Lee So-yoonYoung Mi-sol | Young Mi-sol |