D&D was a Japanese girl group that was moderately popular in the late '90's. Its members were Higa Chikano, Olivia Lufkin and Uehara Aya. D&D is an acronym for Dance & Dream. Their music could be described as very happy, almost 80's styled J-Pop, mixed with Eurobeat. Late in 1998, producer Komuro Tetsuya decided that Olivia Lufkin had a huge potential to become a solo artist, and broke D&D up into two different artists; OLIVIA, Olivia Lufkin's solo project and Aya & Chika from D&D, the remaining two members. OLIVIA released her first single, I.L.Y. ~Yokubou~, in February 1999.

Aya and Chikano released two more singles under the name of Aya & Chika from D&D, before disbanding. In fact, a third single had been planned (described by Neowing as a Fresh, pop song) but was later canceled.

Aya and Chikano both joined Avex' new group Hipp's in July 2000.