AI少女と深層心海 (AI Shoujo to Shinsou Shinkai)

Background
This work is the ninth entry of the song series Star Girl and The Illusion Paradise.

The song begins with Dr. Realist explaining his past as a scientist. The many other planets are in a similar situation and asks for Reborn Girl's cooperation in shutting down the Stella system. She accepts, and is given her form as Rho. They travel through the many layers of the fantastic garden, while encountering its many victims along the way. Finally, they find the lonely A.I Girl, the one orchestrating the illusion paradise and rescue her from its darkness. With the Stella system finally destroyed, they invite her to join them. She accepts, and is given her form as Lambda.

It is featured on the album Hoshi no Shoujo to Gensou Rakudo.