Aspiring writer Ki-hwan has a small secret about his left nipple, but he doesn’t have the courage to tell his girlfriend Eui-jung. One day while over at Eui-jung’s place, he ends up finding out about her secret.
| Actor | Role |
|---|---|
 Bae Yu-ramKi-hwan | Ki-hwan |
 Kim Yae-eunEui-jung | Eui-jung |
 Hong Sang-pyoSung-pil | Sung-pil |
 Nam Yeon-wooHyun-woo | Hyun-woo |