Naniwa Danshi's 10th single, "HARD WORK", serves as the theme song for the drama "Yokohama Neighbors Season 1", starring member Ryusei Onishi. As the group enters their 5th anniversary year since debut, the song is finished as a track that allows listeners to feel the growth of Naniwa Danshi. In addition, the single also includes "Never Romantic", which was released last year as a digital single and served as the miracle theme song for the movie "Romantic Killer". The bonus video content of Limited First Press Edition 2 includes the "Never Romantic" Making of Music Video, as well as the "Never Romantic" Music Video Full Romantic ver., which adds unreleased scenes that were reluctantly cut and rare NG scenes to the end credits, and the "Never Romantic" Music Video Solo Romantic ver., which contains seven solo music videos focusing on each member individually. The CD includes the new coupling track "Mada Haru no Mama". A 20-page lyrics booklet is enclosed.