"Sign" (サイン, Sain) is Beni's sixth single under the label Nayutawave Records.

[1] The leading song contains a sample of the piano from Yumi Matsutoya's 1994 song "Haru yo, Koi".

[2] The first press bonus will include a BENIxMURUA collaborative interchangeable jacket and for a lucky group of fifty, they will be awarded with a BENIxMURUA collaborative T-shirt.

[3] The single charted at the weekly spot #50 and sold 1,596 copies.