GLAY brings the 53rd single. This is the fourth volume of their "G4" series, which contains songs all written by the members themselves every time. This single includes an intro theme for the TV anime series "Ace of Diamond: Second Season," "Sora ga Aozara de Arutame ni." This edition includes a bonus DVD with four music videos for all the included songs, excerpts from their 20th anniversary concert held at Tokyo Dome ("pure soul" & "Hyakka Ryoran"), and two more live tracks taken from concerts held on July 25 and 26, 2015 at Hakodate Arena ("My Private "jealousy" & "Itsuka").