diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index d9322b37..551ef6fd 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -54423,12 +54423,12 @@ Address,Quality,Size,Name
 0x0000007100901a90,U,000068,
 0x0000007100901ad4,U,000100,
 0x0000007100901b38,U,000108,
-0x0000007100901ba4,O,000164,_ZN4ksys6nxargs14createInstanceEPN4sead4HeapE
-0x0000007100901c48,U,000152,nxargs::dtor
-0x0000007100901ce0,U,000148,nxargs::dtorDelete
-0x0000007100901d74,O,000804,_ZN4ksys6nxargs4initEPN4sead4HeapE
-0x0000007100902098,O,000632,_ZN4ksys6nxargs12allocEntriesEPN4sead4HeapEPKh
-0x0000007100902310,U,000320,_ZN4ksys6nxargs10handleArgsEv
+0x0000007100901ba4,O,000164,_ZN5uking6nxargs14createInstanceEPN4sead4HeapE
+0x0000007100901c48,U,000152,uking::nxargs::dtor
+0x0000007100901ce0,U,000148,uking::nxargs::dtorDelete
+0x0000007100901d74,O,000804,_ZN5uking6nxargs4initEPN4sead4HeapE
+0x0000007100902098,O,000632,_ZN5uking6nxargs12allocEntriesEPN4sead4HeapEPKh
+0x0000007100902310,U,000320,_ZN5uking6nxargs10handleArgsEv
 0x0000007100902450,U,002848,
 0x0000007100902f70,U,000004,j__ZdlPv_410
 0x0000007100902f74,U,000240,_ZN4sead15FixedSafeStringILi37EEaSERKNS_14SafeStringBaseIcEE
@@ -54583,22 +54583,22 @@ Address,Quality,Size,Name
 0x000000710090add8,U,000008,
 0x000000710090ade0,U,000040,
 0x000000710090ae08,U,000384,
-0x000000710090af88,O,000028,_ZN4ksys14SystemPauseMgrC1Ev
-0x000000710090afa4,O,000004,_ZN4ksys14SystemPauseMgrD1Ev
-0x000000710090afa8,O,000004,_ZN4ksys14SystemPauseMgrD0Ev
+0x000000710090af88,O,000028,_ZN5uking14SystemPauseMgrC1Ev
+0x000000710090afa4,O,000004,_ZN5uking14SystemPauseMgrD1Ev
+0x000000710090afa8,O,000004,_ZN5uking14SystemPauseMgrD0Ev
 0x000000710090afac,U,000004,j_nullsub_3106
-0x000000710090afb0,U,000152,
-0x000000710090b048,U,000224,
-0x000000710090b128,U,000124,
-0x000000710090b1a4,U,000096,
-0x000000710090b204,U,000252,
-0x000000710090b300,U,000072,
-0x000000710090b348,U,000096,
-0x000000710090b3a8,U,000280,
-0x000000710090b4c0,U,000240,
-0x000000710090b5b0,U,000236,RootTaskStuff::openFadeScreen
-0x000000710090b69c,U,000312,
-0x000000710090b7d4,U,000072,
+0x000000710090afb0,U,000152,uking::SystemPauseMgr::waitForOnUiActorMgrAndBlockSaveMaybe
+0x000000710090b048,U,000224,uking::SystemPauseMgr::stopNfpAndWaitForSaveMgr
+0x000000710090b128,U,000124,uking::SystemPauseMgr::waitForOnUiActorMgr
+0x000000710090b1a4,U,000096,uking::SystemPauseMgr::pauseGameSceneAndWait
+0x000000710090b204,U,000252,uking::SystemPauseMgr::releaseScreensAndShowMainLayer
+0x000000710090b300,U,000072,uking::SystemPauseMgr::onSystemPauseResume
+0x000000710090b348,U,000096,uking::SystemPauseMgr::waitForStageGenFinalStep
+0x000000710090b3a8,U,000280,uking::SystemPauseMgr::restoreMainLayerAndResumeGameScene
+0x000000710090b4c0,U,000240,uking::SystemPauseMgr::hideMainLayer
+0x000000710090b5b0,U,000236,uking::SystemPauseMgr::openFadeScreen
+0x000000710090b69c,U,000312,uking::SystemPauseMgr::showMainLayerAndResumeProcJobs
+0x000000710090b7d4,U,000072,uking::SystemPauseMgr::clearHideMainLayerAndResumeEvents
 0x000000710090b81c,U,001044,
 0x000000710090bc30,U,000268,setPauseState1
 0x000000710090bd3c,U,000300,setPauseState0
diff --git a/src/Game/CMakeLists.txt b/src/Game/CMakeLists.txt
index e7a19dc2..47255a1a 100644
--- a/src/Game/CMakeLists.txt
+++ b/src/Game/CMakeLists.txt
@@ -12,4 +12,8 @@ target_sources(uking PRIVATE
   gamePlayReport.h
   E3Mgr.cpp
   E3Mgr.h
+  NXArgs.cpp
+  NXArgs.h
+  SystemPauseMgr.cpp
+  SystemPauseMgr.h
 )
diff --git a/src/KingSystem/System/NXArgs.cpp b/src/Game/NXArgs.cpp
similarity index 97%
rename from src/KingSystem/System/NXArgs.cpp
rename to src/Game/NXArgs.cpp
index 46df7f39..9fa4b397 100644
--- a/src/KingSystem/System/NXArgs.cpp
+++ b/src/Game/NXArgs.cpp
@@ -1,6 +1,6 @@
-#include "KingSystem/System/NXArgs.h"
+#include "Game/NXArgs.h"
 
-namespace ksys {
+namespace uking {
 
 SEAD_SINGLETON_DISPOSER_IMPL(nxargs)
 
@@ -75,4 +75,4 @@ void nxargs::allocEntries(sead::Heap* heap, const u8* data) {
     }
 }
 
-}  // namespace ksys
\ No newline at end of file
+}  // namespace uking
\ No newline at end of file
diff --git a/src/KingSystem/System/NXArgs.h b/src/Game/NXArgs.h
similarity index 98%
rename from src/KingSystem/System/NXArgs.h
rename to src/Game/NXArgs.h
index 6ba6696e..8246d017 100644
--- a/src/KingSystem/System/NXArgs.h
+++ b/src/Game/NXArgs.h
@@ -9,7 +9,7 @@
 #include <prim/seadSafeString.h>
 #include "KingSystem/Utils/Types.h"
 
-namespace ksys {
+namespace uking {
 
 class nxargs {
     SEAD_SINGLETON_DISPOSER(nxargs)
@@ -96,4 +96,4 @@ private:
 };
 KSYS_CHECK_SIZE_NX150(nxargs, 0x48);
 
-}  // namespace ksys
\ No newline at end of file
+}  // namespace uking
\ No newline at end of file
diff --git a/src/KingSystem/System/SystemPauseMgr.cpp b/src/Game/SystemPauseMgr.cpp
similarity index 52%
rename from src/KingSystem/System/SystemPauseMgr.cpp
rename to src/Game/SystemPauseMgr.cpp
index ce8ddbdf..120f165f 100644
--- a/src/KingSystem/System/SystemPauseMgr.cpp
+++ b/src/Game/SystemPauseMgr.cpp
@@ -1,9 +1,9 @@
-#include "KingSystem/System/SystemPauseMgr.h"
+#include "Game/SystemPauseMgr.h"
 
-namespace ksys {
+namespace uking {
 
 SystemPauseMgr::SystemPauseMgr() = default;
 
 SystemPauseMgr::~SystemPauseMgr() = default;
 
-}  // namespace ksys
+}  // namespace uking
diff --git a/src/Game/SystemPauseMgr.h b/src/Game/SystemPauseMgr.h
new file mode 100644
index 00000000..bbfdd218
--- /dev/null
+++ b/src/Game/SystemPauseMgr.h
@@ -0,0 +1,34 @@
+#pragma once
+
+#include "KingSystem/System/OverlayArenaSystem.h"
+#include "KingSystem/Utils/Types.h"
+
+namespace uking {
+
+class SystemPauseMgr : public ksys::ISystemPauseMgr {
+public:
+    SystemPauseMgr();
+    ~SystemPauseMgr() override;
+
+    void m2() override;
+    void waitForOnUiActorMgrAndBlockSaveMaybe() override;
+    void stopNfpAndWaitForSaveMgr() override;
+    void waitForOnUiActorMgr() override;
+    void pauseGameSceneAndWait() override;
+    bool releaseScreensAndShowMainLayer() override;
+    void onSystemPauseResume() override;
+    void waitForStageGenFinalStep() override;
+    void restoreMainLayerAndResumeGameScene() override;
+    bool hideMainLayer() override;
+    void openFadeScreen() override;
+    void showMainLayerAndResumeProcJobs() override;
+    void clearHideMainLayerAndResumeEvents() override;
+
+    bool wasMainLayerVisible() const { return mMainLayerWasVisible; }
+
+private:
+    bool mMainLayerWasVisible = true;
+};
+KSYS_CHECK_SIZE_NX150(SystemPauseMgr, 0x10);
+
+}  // namespace uking
diff --git a/src/KingSystem/System/CMakeLists.txt b/src/KingSystem/System/CMakeLists.txt
index 340ab774..835eb40f 100644
--- a/src/KingSystem/System/CMakeLists.txt
+++ b/src/KingSystem/System/CMakeLists.txt
@@ -27,8 +27,6 @@ target_sources(uking PRIVATE
     MemoryProfiler.h
     MessageCapture.cpp
     MessageCapture.h
-    NXArgs.cpp
-    NXArgs.h
     OcclusionQueryCylinder.cpp
     OcclusionQueryCylinder.h
     OverlayArena.cpp
@@ -50,8 +48,6 @@ target_sources(uking PRIVATE
     StarterPackMgr.cpp
     StarterPackMgr.h
     StringBoard.h
-    SystemPauseMgr.cpp
-    SystemPauseMgr.h
     SystemTimers.cpp
     SystemTimers.h
     Terminal.cpp
diff --git a/src/KingSystem/System/OverlayArenaSystem.cpp b/src/KingSystem/System/OverlayArenaSystem.cpp
index 1731b491..bafb705a 100644
--- a/src/KingSystem/System/OverlayArenaSystem.cpp
+++ b/src/KingSystem/System/OverlayArenaSystem.cpp
@@ -6,7 +6,6 @@
 #include "KingSystem/Resource/resSystem.h"
 #include "KingSystem/Sound/sndResource.h"
 #include "KingSystem/System/OverlayArena.h"
-#include "KingSystem/System/SystemPauseMgr.h"
 #include "KingSystem/Terrain/teraSystem.h"
 #include "KingSystem/Utils/Thread/Task.h"
 #include "KingSystem/Utils/Thread/TaskThread.h"
diff --git a/src/KingSystem/System/OverlayArenaSystem.h b/src/KingSystem/System/OverlayArenaSystem.h
index 73d55373..a0a3cd71 100644
--- a/src/KingSystem/System/OverlayArenaSystem.h
+++ b/src/KingSystem/System/OverlayArenaSystem.h
@@ -23,7 +23,25 @@ class TaskThread;
 }  // namespace util
 
 class OverlayArena;
-class SystemPauseMgr;
+
+class ISystemPauseMgr {
+public:
+    virtual ~ISystemPauseMgr() = default;
+
+    virtual void m2() = 0;
+    virtual void waitForOnUiActorMgrAndBlockSaveMaybe() = 0;
+    virtual void stopNfpAndWaitForSaveMgr() = 0;
+    virtual void waitForOnUiActorMgr() = 0;
+    virtual void pauseGameSceneAndWait() = 0;
+    virtual bool releaseScreensAndShowMainLayer() = 0;
+    virtual void onSystemPauseResume() = 0;
+    virtual void waitForStageGenFinalStep() = 0;
+    virtual void restoreMainLayerAndResumeGameScene() = 0;
+    virtual bool hideMainLayer() = 0;
+    virtual void openFadeScreen() = 0;
+    virtual void showMainLayerAndResumeProcJobs() = 0;
+    virtual void clearHideMainLayerAndResumeEvents() = 0;
+};
 
 // FIXME: incomplete
 class OverlayArenaSystem {
@@ -34,7 +52,7 @@ class OverlayArenaSystem {
 
 public:
     struct InitArg {
-        SystemPauseMgr* system_pause_mgr;
+        ISystemPauseMgr* system_pause_mgr;
     };
 
     bool init(const InitArg& arg, sead::Heap* heap);
@@ -95,7 +113,7 @@ private:
     OverlayArena* mAudioArena = nullptr;
     OverlayArena* mUnknownArena = nullptr;
     sead::Heap* mJpegHeap = nullptr;
-    SystemPauseMgr* mSystemPauseMgr = nullptr;
+    ISystemPauseMgr* mSystemPauseMgr = nullptr;
     OverlayArenaSystemS1 mS1;
     u32 _b8 = 0;
     util::TaskThread* mPrepareThread = nullptr;
diff --git a/src/KingSystem/System/OverlayArenaSystemS2.h b/src/KingSystem/System/OverlayArenaSystemS2.h
index f40f735c..792cc12f 100644
--- a/src/KingSystem/System/OverlayArenaSystemS2.h
+++ b/src/KingSystem/System/OverlayArenaSystemS2.h
@@ -6,15 +6,15 @@
 
 namespace ksys {
 
+class ISystemPauseMgr;
 class OverlayArenaSystemS1;
-class SystemPauseMgr;
 
 // FIXME: incomplete
 class OverlayArenaSystemS2 {
 public:
     struct InitArg {
         OverlayArenaSystemS1* s1;
-        SystemPauseMgr* system_pause_mgr;
+        ISystemPauseMgr* system_pause_mgr;
     };
 
     OverlayArenaSystemS2();
diff --git a/src/KingSystem/System/SystemPauseMgr.h b/src/KingSystem/System/SystemPauseMgr.h
deleted file mode 100644
index 43ca4efc..00000000
--- a/src/KingSystem/System/SystemPauseMgr.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#pragma once
-
-#include "KingSystem/Utils/Types.h"
-
-namespace ksys {
-
-class SystemPauseMgr {
-public:
-    SystemPauseMgr();
-    virtual ~SystemPauseMgr();
-
-    virtual void m2();
-    virtual void m3();
-    virtual void m4();
-    virtual void m5();
-    virtual void m6();
-    virtual bool m7();
-    virtual void m8();
-    virtual void m9();
-    virtual void m10();
-    virtual bool m11();
-    virtual void m12();
-    virtual void m13();
-    virtual void m14();
-
-    bool get8() const { return _8; }
-
-private:
-    bool _8 = true;
-};
-KSYS_CHECK_SIZE_NX150(SystemPauseMgr, 0x10);
-
-}  // namespace ksys