Bitter & Sweet is the most successful of Beni's career, it being certified gold by the RIAJ (her only album to receive a certification).

"Sign" samples Yumi Matsutoya's number-one hit, "Haru yo, Koi" (春よ、来い, "Come, Spring").

[4] On the Billboard Japan Hot 100 the single peaked at number 96.

[7] "Yurayura" was also her highest-charting single on the Japan Hot 100, ranking in at #25.

The promotion was documented over three episodes on the late night TV show Future Tracks R.[9][10][11] One of the songs from the album, "Kimi ja Nakya," was released as a ringtone two weeks before the album's release date.