The Extra's Playbook

Ahn Ji-yoon's high school rules: 1. Be a background character for my friends. 2. Enjoy the mundane routine. 3. Romance is for the main characters, not me. However, the appearance of Cha Hyun-seung and Jung Hyung-woo unexpectedly shattered this peace—"Wait…the rules don't say what to do if a supporting character falls for someone?!"