diff --git a/asm/managerD.s b/asm/managerD.s
deleted file mode 100644
index eb9f36f9..00000000
--- a/asm/managerD.s
+++ /dev/null
@@ -1,87 +0,0 @@
-	.include "asm/macros.inc"
-
-	.include "constants/constants.inc"
-
-	.syntax unified
-
-	.text
-
-	thumb_func_start ManagerD_Main
-ManagerD_Main: @ 0x08058DD0
-	push {lr}
-	ldr r2, _08058DE4 @ =gUnk_08108308
-	ldrb r1, [r0, #0xc]
-	lsls r1, r1, #2
-	adds r1, r1, r2
-	ldr r1, [r1]
-	bl _call_via_r1
-	pop {pc}
-	.align 2, 0
-_08058DE4: .4byte gUnk_08108308
-
-	thumb_func_start sub_08058DE8
-sub_08058DE8: @ 0x08058DE8
-	push {r4, lr}
-	adds r4, r0, #0
-	ldrh r0, [r4, #0x3e]
-	bl CheckFlags
-	cmp r0, #0
-	beq _08058DFC
-	bl DeleteThisEntity
-	b _08058E14
-_08058DFC:
-	movs r0, #1
-	strb r0, [r4, #0xc]
-	ldrh r0, [r4, #0x3a]
-	bl GetLayerByIndex
-	ldrh r1, [r4, #0x38]
-	lsls r1, r1, #1
-	adds r1, #4
-	adds r0, r0, r1
-	str r0, [r4, #0x30]
-	ldrh r0, [r0]
-	strh r0, [r4, #0x28]
-_08058E14:
-	pop {r4, pc}
-	.align 2, 0
-
-	thumb_func_start sub_08058E18
-sub_08058E18: @ 0x08058E18
-	push {lr}
-	adds r2, r0, #0
-	ldr r1, [r2, #0x30]
-	ldrh r0, [r2, #0x28]
-	ldrh r1, [r1]
-	cmp r0, r1
-	beq _08058E30
-	ldrb r0, [r2, #0xc]
-	adds r0, #1
-	strb r0, [r2, #0xc]
-	movs r0, #0xf
-	strb r0, [r2, #0xe]
-_08058E30:
-	pop {pc}
-	.align 2, 0
-
-	thumb_func_start sub_08058E34
-sub_08058E34: @ 0x08058E34
-	push {r4, lr}
-	adds r4, r0, #0
-	ldrb r0, [r4, #0xe]
-	subs r0, #1
-	strb r0, [r4, #0xe]
-	lsls r0, r0, #0x18
-	cmp r0, #0
-	bne _08058E5E
-	ldrh r0, [r4, #0x3e]
-	bl SetFlag
-	ldrb r0, [r4, #0xa]
-	cmp r0, #0
-	beq _08058E58
-	bl GetCurrentRoomProperty
-	bl LoadRoomEntityList
-_08058E58:
-	adds r0, r4, #0
-	bl DeleteManager
-_08058E5E:
-	pop {r4, pc}
diff --git a/include/manager.h b/include/manager.h
index 7c16c074..4c60431c 100644
--- a/include/manager.h
+++ b/include/manager.h
@@ -152,7 +152,7 @@ extern void Manager9_Main();
 extern void ManagerA_Main();
 extern void ManagerB_Main();
 extern void ManagerC_Main();
-extern void ManagerD_Main(Entity*);
+extern void ManagerD_Main();
 extern void ManagerE_Main();
 extern void ManagerF_Main(Entity*);
 extern void Manager10_Main(Entity*);
diff --git a/linker.ld b/linker.ld
index a3fe3a56..281032f7 100644
--- a/linker.ld
+++ b/linker.ld
@@ -513,7 +513,7 @@ SECTIONS {
         src/manager/managerA.o(.text);
         src/manager/managerB.o(.text);
         src/manager/managerC.o(.text);
-        asm/managerD.o(.text);
+        src/manager/managerD.o(.text);
         src/manager/managerE.o(.text);
         asm/managerF.o(.text);
         asm/manager10.o(.text);
diff --git a/src/manager/managerD.c b/src/manager/managerD.c
new file mode 100644
index 00000000..dcd31bb5
--- /dev/null
+++ b/src/manager/managerD.c
@@ -0,0 +1,74 @@
+#include "manager.h"
+#include "flags.h"
+#include "room.h"
+#include "functions.h"
+
+typedef struct {
+    Manager manager;
+    u8 field_0x20;
+    u8 field_0x21;
+    u8 field_0x22;
+    u8 field_0x23;
+    u8 field_0x24;
+    u8 field_0x25;
+    u8 field_0x26;
+    u8 field_0x27;
+    u16 field_0x28;
+    u8 field_0x2a;
+    u8 field_0x2b;
+    u8 field_0x2c;
+    u8 field_0x2d;
+    u8 field_0x2e;
+    u8 field_0x2f;
+    u16* field_0x30;
+    u8 field_0x34;
+    u8 field_0x35;
+    u8 field_0x36;
+    u8 field_0x37;
+    u16 field_0x38;
+    u16 field_0x3a;
+    u8 field_0x3c;
+    u8 field_0x3d;
+    u16 field_0x3e;
+} ManagerD;
+
+
+extern void (*const gUnk_08108308[])(ManagerD*);
+
+extern u16* GetLayerByIndex(u32);
+
+void ManagerD_Main(ManagerD* this) {
+    gUnk_08108308[this->manager.action](this);
+}
+
+void sub_08058DE8(ManagerD* this) {
+    u16* puVar2;
+    u16* puVar3;
+    if (CheckFlags(this->field_0x3e) != 0) {
+        DeleteThisEntity();
+    } else {
+        this->manager.action = 1;
+        puVar2 = GetLayerByIndex(this->field_0x3a);
+        puVar3 = (this->field_0x38 + 2) + puVar2;
+        this->field_0x30 = puVar3;
+        this->field_0x28 = *puVar3;
+    
+    }
+}
+
+void sub_08058E18(ManagerD* this) {
+    if (this->field_0x28 != *this->field_0x30) {
+        this->manager.action += 1;
+        this->manager.unk_0e = 0xf;
+    }
+}
+
+void sub_08058E34(ManagerD* this) {
+    if (--this->manager.unk_0e == 0) {
+        SetFlag(this->field_0x3e);
+        if (this->manager.unk_0a != 0) {
+            LoadRoomEntityList((EntityData*)GetCurrentRoomProperty(this->manager.unk_0a));
+        }
+        DeleteManager((Manager*)this);
+    }
+}