diff --git a/src/core/hle/service/apt/apt.cpp b/src/core/hle/service/apt/apt.cpp
index f7fb0660f..a46b96d5c 100644
--- a/src/core/hle/service/apt/apt.cpp
+++ b/src/core/hle/service/apt/apt.cpp
@@ -650,6 +650,37 @@ void Module::APTInterface::CloseLibraryApplet(Kernel::HLERequestContext& ctx) {
     rb.Push(apt->applet_manager->CloseLibraryApplet(std::move(object), std::move(buffer)));
 }
 
+void Module::APTInterface::LoadSysMenuArg(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp(ctx, 0x36, 1, 0); // 0x00360040
+    const auto size = std::min(std::size_t{rp.Pop<u32>()}, SysMenuArgSize);
+
+    // This service function does not clear the buffer.
+
+    std::vector<u8> buffer(size);
+    std::copy_n(apt->sys_menu_arg_buffer.cbegin(), size, buffer.begin());
+
+    IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
+    rb.Push(RESULT_SUCCESS);
+    rb.PushStaticBuffer(std::move(buffer), 0);
+
+    LOG_DEBUG(Service_APT, "called");
+}
+
+void Module::APTInterface::StoreSysMenuArg(Kernel::HLERequestContext& ctx) {
+    IPC::RequestParser rp(ctx, 0x37, 1, 2); // 0x00370042
+    const auto size = std::min(std::size_t{rp.Pop<u32>()}, SysMenuArgSize);
+    const auto& buffer = rp.PopStaticBuffer();
+
+    ASSERT_MSG(buffer.size() >= size, "Buffer too small to hold requested data");
+
+    std::copy_n(buffer.cbegin(), size, apt->sys_menu_arg_buffer.begin());
+
+    IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
+    rb.Push(RESULT_SUCCESS);
+
+    LOG_DEBUG(Service_APT, "called");
+}
+
 void Module::APTInterface::SendCaptureBufferInfo(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x40, 1, 2); // 0x00400042
     u32 size = rp.Pop<u32>();
diff --git a/src/core/hle/service/apt/apt.h b/src/core/hle/service/apt/apt.h
index 2e2c219cd..a2158c217 100644
--- a/src/core/hle/service/apt/apt.h
+++ b/src/core/hle/service/apt/apt.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <array>
 #include <memory>
 #include <vector>
 #include "common/common_funcs.h"
@@ -42,6 +43,8 @@ struct CaptureBufferInfo {
 };
 static_assert(sizeof(CaptureBufferInfo) == 0x20, "CaptureBufferInfo struct has incorrect size");
 
+constexpr std::size_t SysMenuArgSize = 0x40;
+
 enum class StartupArgumentType : u32 {
     OtherApp = 0,
     Restart = 1,
@@ -518,6 +521,32 @@ public:
          */
         void CloseLibraryApplet(Kernel::HLERequestContext& ctx);
 
+        /**
+         * APT::LoadSysMenuArg service function
+         *  Inputs:
+         *      0 : Command header [0x00360040]
+         *      1 : Buffer size
+         *  Outputs:
+         *      0 : Header code
+         *      1 : Result code
+         *     64 : Size << 14 | 2
+         *     65 : void* Output Buffer
+         */
+        void LoadSysMenuArg(Kernel::HLERequestContext& ctx);
+
+        /**
+         * APT::StoreSysMenuArg service function
+         *  Inputs:
+         *      0 : Command header [0x00370042]
+         *      1 : Buffer size
+         *      2 : (Size << 14) | 2
+         *      3 : Input buffer virtual address
+         *  Outputs:
+         *      0 : Header code
+         *      1 : Result code
+         */
+        void StoreSysMenuArg(Kernel::HLERequestContext& ctx);
+
         /**
          * APT::SendCaptureBufferInfo service function
          *  Inputs:
@@ -625,6 +654,7 @@ private:
     u8 unknown_ns_state_field = 0;
 
     std::vector<u8> screen_capture_buffer;
+    std::array<u8, SysMenuArgSize> sys_menu_arg_buffer;
 
     ScreencapPostPermission screen_capture_post_permission =
         ScreencapPostPermission::CleanThePermission; // TODO(JamePeng): verify the initial value
diff --git a/src/core/hle/service/apt/apt_s.cpp b/src/core/hle/service/apt/apt_s.cpp
index 1843bdd9a..01b303330 100644
--- a/src/core/hle/service/apt/apt_s.cpp
+++ b/src/core/hle/service/apt/apt_s.cpp
@@ -62,8 +62,8 @@ APT_S::APT_S(std::shared_ptr<Module> apt)
         {0x00330000, &APT_S::GetProgramIdOnApplicationJump, "GetProgramIdOnApplicationJump"},
         {0x00340084, nullptr, "SendDeliverArg"},
         {0x00350080, nullptr, "ReceiveDeliverArg"},
-        {0x00360040, nullptr, "LoadSysMenuArg"},
-        {0x00370042, nullptr, "StoreSysMenuArg"},
+        {0x00360040, &APT_S::LoadSysMenuArg, "LoadSysMenuArg"},
+        {0x00370042, &APT_S::StoreSysMenuArg, "StoreSysMenuArg"},
         {0x00380040, nullptr, "PreloadResidentApplet"},
         {0x00390040, nullptr, "PrepareToStartResidentApplet"},
         {0x003A0044, nullptr, "StartResidentApplet"},
diff --git a/src/core/hle/service/apt/apt_u.cpp b/src/core/hle/service/apt/apt_u.cpp
index 0ecbd65da..ac354dc23 100644
--- a/src/core/hle/service/apt/apt_u.cpp
+++ b/src/core/hle/service/apt/apt_u.cpp
@@ -62,8 +62,8 @@ APT_U::APT_U(std::shared_ptr<Module> apt)
         {0x00330000, &APT_U::GetProgramIdOnApplicationJump, "GetProgramIdOnApplicationJump"},
         {0x00340084, nullptr, "SendDeliverArg"},
         {0x00350080, nullptr, "ReceiveDeliverArg"},
-        {0x00360040, nullptr, "LoadSysMenuArg"},
-        {0x00370042, nullptr, "StoreSysMenuArg"},
+        {0x00360040, &APT_U::LoadSysMenuArg, "LoadSysMenuArg"},
+        {0x00370042, &APT_U::StoreSysMenuArg, "StoreSysMenuArg"},
         {0x00380040, nullptr, "PreloadResidentApplet"},
         {0x00390040, nullptr, "PrepareToStartResidentApplet"},
         {0x003A0044, nullptr, "StartResidentApplet"},