
Quick answer — Hazuki Takeoka worked on Masamune-kun's Revenge R (Original Story), Masamune-kun's Revenge (Original Story), Masamune-kun's Revenge OAD (Original Story).
Hazuki Takeoka worked on Masamune-kun's Revenge R (Original Story), Masamune-kun's Revenge (Original Story), Masamune-kun's Revenge OAD (Original Story).