Co-Ed's female sub-unit, 5dolls, has finally unveiled the music video for their debut track, "Lip Stains"! This marks the formal debut of Co-Ed's latest addition, Seo Eun Gyo, and the music video has her participating in a dance battle against member Chanmi to capture Jay Park's heart. Check it out below! The group will start their music program promotions on February 17th.