Features a concert of Spitz's 30th anniversary tour "THIRTY30FIFTY50" held at Yokohama Arena on August 24, 2017. Contains three new songs "Heavy Mellow," "Uta Usagi," and "1987," and a rare tune "Naminori" on their live works for the first time. Deluxe edition comes with a bonus disc featuring the 30th anniversary video, two live CDs including 27 tracks total, and a 100-page photo book. Features slipcase packaging with sticker.