The programmer of the ultimate online dating game starts to fall in love with its most troublesome user, who happens to work in the same building as him.
| Actor | Role |
|---|---|
 Cho Seung-wooHyung-tae | Hyung-tae |
 Lee Na-youngIn-ju | In-ju |
 Cho Eun-jiBo-young | Bo-young |
 Lee Jang-wonNam-hoon | Nam-hoon |
 Kim Kwang-ilSang-hoon | Sang-hoon |
 Bae Hae-sunSoo-hyun | Soo-hyun |
 Park Hae-ilIn-ju's Ex-boyfriend | In-ju's Ex-boyfriend |
 Jeon Ik-ryoungOasis | Oasis |