
Quick answer — Chiaki Takahashi worked on The Idolm@ster: 765 Pro to Iu Monogatari (Theme Song Performance), We Without Wings – Under the Innocent Sky (Theme Song Performance), Rio: Rainbow Gate! (Theme Song Performance).
Chiaki Takahashi worked on The Idolm@ster: 765 Pro to Iu Monogatari (Theme Song Performance), We Without Wings – Under the Innocent Sky (Theme Song Performance), Rio: Rainbow Gate! (Theme Song Performance).