The series' theme song is "Rondo-Revolution", written and performed by Masami Okui, and composed and arranged by Toshiro Yabuki. Ikuhara told Okui to "think of this as a song that will play during the story's last scene" when writing "Rondo-Revolution", though at the time he had not yet decided what the last scene would be beyond a vague concept of two people parting from each other. Ikuhara sent several key phrases to Okui use as lyrics, including "sunlit garden", "revolutionize", "lose everything", "strip down to nothing at all", and "change the world". The series uses two ending themes: episodes 1 to 24 use "Truth", performed by with lyrics by Shoko Fujibayashi; episodes 25 to 38 use "Virtual Star Embryology", performed by Maki Kamiya with lyrics by Seazer. The final episode uses a scat version of "Rondo-Revolution" performed by Okui as its ending theme.
the series' theme song is "rondo-revolution" written and performed by masami okui and composed and arranged by toshiro yabuki ikuhara told okui to "think of this as a song that will play during the story's last scene" when writing "rondo-revolution" though at the time he had not yet decided what the last scene would be beyond a vague concept of two people parting from each other ikuhara sent several key phrases to okui use as lyrics including "sunlit garden" "revolutionize" "lose everything" "strip down to nothing at all" and "change the world" the series uses two ending themes episodes 1 to 24 use "truth" performed by with lyrics by shoko fujibayashi; episodes 25 to 38 use "virtual star embryology" performed by maki kamiya with lyrics by seazer the final episode uses a scat version of "rondo-revolution" performed by okui as its ending theme