diff --git a/src/KingSystem/ActorSystem/CMakeLists.txt b/src/KingSystem/ActorSystem/CMakeLists.txt
index b75e8817..ff71baf1 100644
--- a/src/KingSystem/ActorSystem/CMakeLists.txt
+++ b/src/KingSystem/ActorSystem/CMakeLists.txt
@@ -26,6 +26,8 @@ target_sources(uking PRIVATE
   actActorParam.h
   actActorParamMgr.cpp
   actActorParamMgr.h
+  actActorSystem.cpp
+  actActorSystem.h
   actActorTemplate.cpp
   actActorTemplate.h
   actActorUtil.cpp
diff --git a/src/KingSystem/ActorSystem/actActorSystem.cpp b/src/KingSystem/ActorSystem/actActorSystem.cpp
new file mode 100644
index 00000000..c6573571
--- /dev/null
+++ b/src/KingSystem/ActorSystem/actActorSystem.cpp
@@ -0,0 +1,7 @@
+#include "KingSystem/ActorSystem/actActorSystem.h"
+
+namespace ksys::act {
+
+SEAD_SINGLETON_DISPOSER_IMPL(ActorSystem)
+
+}  // namespace ksys::act
diff --git a/src/KingSystem/ActorSystem/actActorSystem.h b/src/KingSystem/ActorSystem/actActorSystem.h
new file mode 100644
index 00000000..d1ea3c96
--- /dev/null
+++ b/src/KingSystem/ActorSystem/actActorSystem.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <heap/seadDisposer.h>
+
+namespace ksys::act {
+
+// TODO: incomplete
+class ActorSystem {
+    SEAD_SINGLETON_DISPOSER(ActorSystem)
+    ActorSystem();
+
+public:
+    void onBaseProcMgrCalc();
+};
+
+}  // namespace ksys::act