Cosmic Girls' Seola is the voice behind "Lover" for the 'Summer Strike' OST.

The music video features Seola in the studio as well as scenes of the growing romance between Lee Yeo Reum (played by AOA's Seolhyun) and Ahn Dae Beom (Siwan). "Lover" is about wanting to walk side by side as you journey through life with someone.

Listen to Seola's "Lover" above, and let us know what you think in the comments below.