
Quick answer — Sakaku Hishikawa worked on The Brilliant Healer's New Life in the Shadows (Original Story), Isshun de Chiryou Shiteita no ni Yakutatazu to Tsuihou Sareta Tensai Chiyushi, Yami Healer Toshite Tanoshiku Ikiru 2nd Season (Original Story).
Sakaku Hishikawa worked on The Brilliant Healer's New Life in the Shadows (Original Story), Isshun de Chiryou Shiteita no ni Yakutatazu to Tsuihou Sareta Tensai Chiyushi, Yami Healer Toshite Tanoshiku Ikiru 2nd Season (Original Story).