ACIDMAN brings four titles simultaneously to commemorate their 15th & 10th Anniversary. Part of four-albums ACIDMAN 15th & 10th anniversary series features "Acidman The Best," "This Is Instrumental," "Second Line & Acoustic Live At Shibuya Koukaidou 20111013," and "Acidman The Best Box." This is a greatest hits album featuring their 30 standard numbers plus newly recorded song "to live" on two discs.