Stargazing: Heartful Song - Mizuki Nana
If your series actually hosts a character named "Utau" (or "to sing"), you need a strong vocalist at her back.
Veteran seiyu and singer Mizuki Nana is our talent. With a myriad of prior experience in performing anime songs, her powerful voice is perfect for today's enriching piece. 'Heartful Song' is absolutely brimming with life, and the best part is that the background instrumentals play a minimal part in this.