優雅な歌声が最高の復讐である
A light novel by Kido Hideto (樹戸 英斗), with illustrations by [[U35]].

h4. External links

* "Kadokawa: Yuuga na Utagoe ga Saikou no Fukushuu de Aru":https://www.kadokawa.co.jp/product/321712000013
yuuga na utagoe ga saikou no fukushuu de aru