About three years after the release of their original album "Tenchi Sozo" in February 2022, THE ALFEE returns with a long-awaited new original album! Celebrating their 50th anniversary and continuing their 51st year with the same energy, the album features 11 songs in total, including four previously released singles such as "HEART OF RAINBOW" and "Teinei Kotoba Death!", plus seven brand new tracks. [Limited Edition B] The bonus disc (CD) includes five gems performed in the premium live show held at Ariake Arena on the 50th debut anniversary day, featuring THE ALFEE with an orchestra. This special performance, highly praised by fans, is revived as audio.