GREN new maxi-single: “Mamono” Published 2020-08-13 04:08:02 Author Seraphim Tags auto-generated release GREN has released a new digital maxi-single. Mamono (魔物) was released on August 12th on streaming and digital platforms. AmazonCDJapanRarezHutwishlist2020-08-12GRENGRENMamono魔物Mamono (魔物)Rock Star NightGothic Palette (ゴシックパレット)