It comprises 11 tracks written by Onitsuka, including hit singles "Cage", "Edge", "Memai", and her most well-known and successful song "Gekkō."

The lead-off track "Gekkō" was initially used as a theme song for Trick starring Yukie Nakama and Hiroshi Abe, a television drama series aired on Asahi TV in 2000.

"Rasen" (a song whose working title was "My Fragile Life") was featured on the 2002 motion picture Wasabi directed by Luc Besson and starred by Ryōko Hirosue.

It made her the then-second youngest female chart-topper on the Oricon, following Hikaru Utada, who had already reached the number-one spot with her debut album First Love at the age of 16 in 1999.

All songs composed by Chihiro Onitsuka, except "Edge" "Call" and "Memai" co-written by Takefumi Haketa[2] ^ Shipments figures based on certification alone.