Pentagon's Hui and Kino revealed their lyric video for 'The Greatest Wall'. 

The lyric music video reveals behind-the-scenes footage and photos of Pentagon, and the song itself is about achieving success and sitting on "the greatest wall." Hui and Kino composed and wrote the lyrics, and Hui also had a hand in arranging the song.

Watch Hui and Kino's "The Greatest Wall" lyric video above!