
Quick answer — Ryuuichirou Yamakawa worked on Grisaia: Phantom Trigger THE ANIMATION (Producer), Grisaia: Phantom Trigger THE ANIMATION - Stargazer (Planning).
Ryuuichirou Yamakawa worked on Grisaia: Phantom Trigger THE ANIMATION (Producer), Grisaia: Phantom Trigger THE ANIMATION - Stargazer (Planning).