Sign-language idol Big Ocean (Chan-yeon, PJ, Ji-seok) released a highlight medley video on the 26th for their third mini album 'THE GREATEST BATTLE,' set to launch at 6 p.m. on the 3rd of next month via social media. With their comeback just five days away, the medley video showcases samples from four tracks including the double title tracks 'One Man Army' and 'Cold Moon,' along with 'Alive' and 'Back,' heightening fan anticipation. The opening track 'Alive' conveys a message that even in the darkest moments, we ultimately survive and bloom. 'One Man Army,' the second track and one of the double title tracks, draws inspiration from the Battle of Myeongnyang and captures the fierce spirit of facing the world alone. It dramatically expresses the will of a single person who stands steadfast to the end following retreat, regrouping, and a final decisive battle. The third track 'Back' depicts the moment of reclaiming oneself after betrayal and confusion, with the contrast between a calm beginning and explosive sound completing a dramatic narrative. 'Cold Moon,' the final track and second double title track, uses the moon as a motif, comparing the unreachable distance between two people drawn to each other to the distance between the moon and Earth.