diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index 0824f3ee..0df80d8d 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -1055,6 +1055,11 @@ m_cpedit_ovl.c:
     .text: [0x805CC1F4, 0x805CC3E8]
     .data: [0x806CB838, 0x806CB850]
     .bss: [0x8133E210, 0x8133E218]
+m_cpwarning_ovl.c:
+    .text: [0x805CEC68, 0x805CF458]
+    .rodata: [0x8064B130, 0x8064B198]
+    .data: [0x806CBA18, 0x806CBA70]
+    .bss: [0x8133EE78, 0x8133EE88]
 m_editEndChk_ovl.c:
     .text: [0x805D7A64, 0x805D8498]
     .rodata: [0x8064B2C0, 0x8064B300]
diff --git a/include/m_bank_ovl_h.h b/include/m_bank_ovl_h.h
index 879dd6b1..443b49e3 100644
--- a/include/m_bank_ovl_h.h
+++ b/include/m_bank_ovl_h.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-typedef struct bank_ovl_s mBN_Overlay_c;
+typedef struct bank_ovl_s mBN_Ovl_c;
 
 #ifdef __cplusplus
 }
diff --git a/include/m_cpwarning_ovl.h b/include/m_cpwarning_ovl.h
index 8315626b..52d84b5f 100644
--- a/include/m_cpwarning_ovl.h
+++ b/include/m_cpwarning_ovl.h
@@ -2,11 +2,25 @@
 #define M_CPWARNING_OVL_H
 
 #include "types.h"
+#include "m_cpwarning_ovl_h.h"
+#include "m_submenu.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+struct cpwarning_ovl_s {
+    u8 _00;
+    u8 _01;
+    u8 move_dir;
+    u8 _03;
+    u8 _04;
+    u8 diary_edit_mode;
+    s16 _06;
+    f32 scale;
+    f32 _0C;
+};
+
 extern void mCW_cpwarning_ovl_construct(Submenu* submenu);
 extern void mCW_cpwarning_ovl_destruct(Submenu* submenu);
 extern void mCW_cpwarning_ovl_set_proc(Submenu* submenu);
diff --git a/include/m_cpwarning_ovl_h.h b/include/m_cpwarning_ovl_h.h
index 08aa6d22..2621c914 100644
--- a/include/m_cpwarning_ovl_h.h
+++ b/include/m_cpwarning_ovl_h.h
@@ -7,6 +7,8 @@
 extern "C" {
 #endif
 
+typedef struct cpwarning_ovl_s mCW_Ovl_c;
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/m_submenu_ovl.h b/include/m_submenu_ovl.h
index f71f3e33..4bf0053b 100644
--- a/include/m_submenu_ovl.h
+++ b/include/m_submenu_ovl.h
@@ -36,6 +36,7 @@
 #include "m_needlework_ovl_h.h"
 #include "m_gba_ovl_h.h"
 #include "m_cpedit_ovl_h.h"
+#include "m_cpwarning_ovl_h.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -191,11 +192,11 @@ struct submenu_overlay_s {
     /* 0x9B8 */ mNT_Ovl_c* notice_ovl;
     /* 0x9BC */ mBR_Ovl_c* birthday_ovl;
     /* 0x9C0 */ mCM_Ovl_c* cpmail_ovl;
-    /* 0x9C4 */ void* _9C4;
+    /* 0x9C4 */ mCW_Ovl_c* cpwarning_ovl;
     /* 0x9C8 */ mCE_Ovl_c* cpedit_ovl;
     /* 0x9CC */ mCL_Ovl_c* catalog_ovl;
     /* 0x9D0 */ mMU_Ovl_c* music_ovl;
-    /* 0x9D4 */ mBN_Overlay_c* bank_ovl;
+    /* 0x9D4 */ mBN_Ovl_c* bank_ovl;
     /* 0x9D8 */ mNW_Ovl_c* needlework_ovl;
     /* 0x9DC */ mCO_Ovl_c* cporiginal_ovl;
     /* 0x9E0 */ void* _9E0;
diff --git a/src/m_bank_ovl.c b/src/m_bank_ovl.c
index 5da26139..33501177 100644
--- a/src/m_bank_ovl.c
+++ b/src/m_bank_ovl.c
@@ -21,7 +21,7 @@ static mActor_name_t aNSM_itemNo[MONEY_NUM] = {
   ITM_MONEY_30000
 };
 
-static void mBN_now_bell_2_bell(mBN_Overlay_c* bank_ovl) {
+static void mBN_now_bell_2_bell(mBN_Ovl_c* bank_ovl) {
   int diff = bank_ovl->now_bell - bank_ovl->player_bell;
   bank_ovl->bell = ABS(diff);
 }
@@ -50,7 +50,7 @@ static int mBN_total_item_bell() {
   return total_item_bell;
 }
 
-static void mBN_bank_ok(Submenu* submenu, mSM_MenuInfo_c* menu, mBN_Overlay_c* bank_ovl) {
+static void mBN_bank_ok(Submenu* submenu, mSM_MenuInfo_c* menu, mBN_Ovl_c* bank_ovl) {
   if (bank_ovl->bank_bell < 0) {
     bank_ovl->bank_bell = 0;
   }
@@ -135,7 +135,7 @@ static void mBN_move_Move(Submenu* submenu, mSM_MenuInfo_c* menu) {
 static void mBN_move_Play(Submenu* submenu, mSM_MenuInfo_c* menu) {
   Submenu_Overlay_c* overlay = submenu->overlay;
   int trigger = overlay->menu_control.trigger;
-  mBN_Overlay_c* bank_ovl = overlay->bank_ovl;
+  mBN_Ovl_c* bank_ovl = overlay->bank_ovl;
 
   if (trigger & BUTTON_B) {
     (*overlay->move_chg_base_proc)(menu, mSM_MOVE_OUT_TOP);
@@ -243,7 +243,7 @@ extern Gfx tyo_win_moji3T_model[];
 
 static void mBN_set_frame_dl(Submenu* submenu, GAME* game, mSM_MenuInfo_c* menu) {
   GRAPH* g = game->graph;
-  mBN_Overlay_c* bank_ovl = submenu->overlay->bank_ovl;
+  mBN_Ovl_c* bank_ovl = submenu->overlay->bank_ovl;
   Gfx* gfx;
   u8 s;
   u8 t;
@@ -316,7 +316,7 @@ static void mBN_set_character_dl(Submenu* submenu, GAME* game, mSM_MenuInfo_c* m
   static rgba_t bank_bell_col = { 170, 60, 145, 255 };
   static rgba_t now_bell_col = { 115, 50, 215, 255 };
   
-  mBN_Overlay_c* bank_ovl;
+  mBN_Ovl_c* bank_ovl;
   int cursol;
   f32 width;
   f32 digit_x;
@@ -401,7 +401,7 @@ extern void mBN_bank_ovl_set_proc(Submenu* submenu) {
 
 static void mBN_bank_ovl_init(Submenu* submenu) {
   Submenu_Overlay_c* overlay = submenu->overlay;
-  mBN_Overlay_c* bank_ovl = overlay->bank_ovl;
+  mBN_Ovl_c* bank_ovl = overlay->bank_ovl;
   int i;
 
   overlay->menu_control.animation_flag = FALSE;
@@ -431,13 +431,13 @@ static void mBN_bank_ovl_init(Submenu* submenu) {
   bank_ovl->cursol = 0;
 }
 
-static mBN_Overlay_c bn_ovl_data;
+static mBN_Ovl_c bn_ovl_data;
 
 extern void mBN_bank_ovl_construct(Submenu* submenu) {
   Submenu_Overlay_c* overlay = submenu->overlay;
 
   if (overlay->bank_ovl == NULL) {
-    mem_clear((u8*)&bn_ovl_data, sizeof(mBN_Overlay_c), 0);
+    mem_clear((u8*)&bn_ovl_data, sizeof(mBN_Ovl_c), 0);
     overlay->bank_ovl = &bn_ovl_data;
   }
 
diff --git a/src/m_cpwarning_ovl.c b/src/m_cpwarning_ovl.c
new file mode 100644
index 00000000..fd27fb26
--- /dev/null
+++ b/src/m_cpwarning_ovl.c
@@ -0,0 +1,194 @@
+#include "m_cpwarning_ovl.h"
+
+#include "m_submenu_ovl.h"
+#include "sys_matrix.h"
+#include "m_common_data.h"
+#include "m_font.h"
+
+static mCW_Ovl_c cpwarning_ovl_data;
+
+static u8 mCW_mes0[18] = "Do you want to let";
+static u8 mCW_mes1[27] = "anyone else see this diary?";
+static u8 mCW_yes_mes[3] = "Yes";
+static u8 mCW_no_mes[2] = "No";
+
+enum {
+    mCW_MOVE_OUT,
+    mCW_MOVE_IN,
+
+    mCW_MOVE_NUM
+};
+
+static void mCW_move_Move(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    mCW_Ovl_c* cpwarning_ovl = submenu->overlay->cpwarning_ovl;
+
+    if (cpwarning_ovl->move_dir == mCW_MOVE_IN) {
+        cpwarning_ovl->scale += 0.2f;
+
+        if (cpwarning_ovl->scale > 1.0f) {
+            cpwarning_ovl->scale = 1.0f;
+            menu_info->proc_status = menu_info->next_proc_status;
+            cpwarning_ovl->_00 = 0;
+            cpwarning_ovl->_01 = 0;
+        }
+    } else if (cpwarning_ovl->move_dir == mCW_MOVE_OUT) {
+        cpwarning_ovl->scale -= 0.2f;
+
+        if (cpwarning_ovl->scale < 0.0f) {
+            cpwarning_ovl->scale = 0.0f;
+            menu_info->proc_status = menu_info->next_proc_status;
+            menu_info->next_proc_status = mSM_OVL_PROC_WAIT;
+        }
+    }
+}
+
+static void mCW_move_Play(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    u32 trigger = submenu->overlay->menu_control.trigger;
+    mCW_Ovl_c* cpwarning_ovl = submenu->overlay->cpwarning_ovl;
+
+    if ((trigger & BUTTON_A) != 0) {
+        menu_info->next_proc_status = mSM_OVL_PROC_END;
+        cpwarning_ovl->move_dir = mCW_MOVE_OUT;
+        menu_info->proc_status = mSM_OVL_PROC_MOVE;
+        cpwarning_ovl->scale = 1.0f;
+        cpwarning_ovl->_0C = 1.0f;
+        Now_Private->calendar.edit = cpwarning_ovl->diary_edit_mode;
+    } else if ((trigger & BUTTON_CLEFT) != 0) {
+        if (cpwarning_ovl->diary_edit_mode == 1) {
+            cpwarning_ovl->diary_edit_mode = 0;
+            sAdo_SysTrgStart(NA_SE_CURSOL);
+        }
+    } else if ((trigger & BUTTON_CRIGHT) != 0) {
+        if (cpwarning_ovl->diary_edit_mode == 0) {
+            cpwarning_ovl->diary_edit_mode = 1;
+            sAdo_SysTrgStart(NA_SE_CURSOL);
+        }
+    }
+
+    cpwarning_ovl->_00 = (cpwarning_ovl->_00 + 1) % 30;
+    if (cpwarning_ovl->_00 < 15) {
+        cpwarning_ovl->_01 = (int)(((f32)cpwarning_ovl->_00 * 255.0f) / 15.0f);
+    } else {
+        cpwarning_ovl->_01 = (int)(((f32)(30 - cpwarning_ovl->_00) * 255.0f) / 15.0f);
+    }
+}
+
+static void mCW_move_End(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    submenu->overlay->move_End_proc(submenu, menu_info);
+}
+
+typedef void (*mCW_OVL_PROC)(Submenu*, mSM_MenuInfo_c*);
+
+static void mCW_cpwarning_ovl_move(Submenu* submenu) {
+    static mCW_OVL_PROC ovl_move_proc[] = {
+        &mCW_move_Move, &mCW_move_Play, (mCW_OVL_PROC)&none_proc1, (mCW_OVL_PROC)&none_proc1, &mCW_move_End,
+    };
+
+    mSM_Control_c* control = &submenu->overlay->menu_control;
+    mSM_MenuInfo_c* menu_info = &submenu->overlay->menu_info[mSM_OVL_CPWARNING];
+
+    menu_info->pre_move_func(submenu);
+    (*ovl_move_proc[menu_info->proc_status])(submenu, menu_info);
+}
+
+extern Gfx dia_att_winT_model[];
+extern Gfx dia_att_cursor_model[];
+
+static void mCW_set_frame_dl(Submenu* submenu, GAME* game, mSM_MenuInfo_c* menu_info) {
+    GRAPH* graph = game->graph;
+    mCW_Ovl_c* cpwarning_ovl = submenu->overlay->cpwarning_ovl;
+
+    Matrix_scale(16.0f * cpwarning_ovl->scale, 16.0f * cpwarning_ovl->scale, 1.0f, 0);
+    Matrix_translate(menu_info->position[0], menu_info->position[1], 140.0f, 1);
+
+    OPEN_POLY_OPA_DISP(graph);
+
+    gSPMatrix(POLY_OPA_DISP++, _Matrix_to_Mtx_new(graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gDPSetBlendColor(POLY_OPA_DISP++, 255, 255, 255, 40);
+    gSPDisplayList(POLY_OPA_DISP++, dia_att_winT_model);
+
+    if (cpwarning_ovl->diary_edit_mode) {
+        Matrix_translate(19.0f, -29.0f, 0.0f, 1);
+    } else {
+        Matrix_translate(-19.0f, -29.0f, 0.0f, 1);
+    }
+    gSPMatrix(POLY_OPA_DISP++, _Matrix_to_Mtx_new(graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gSPDisplayList(POLY_OPA_DISP++, dia_att_cursor_model);
+
+    CLOSE_POLY_OPA_DISP(graph);
+}
+
+static void mCW_set_character_dl(Submenu* submenu, GAME* game, mSM_MenuInfo_c* menu_info) {
+    static u8 color_table[2][3] = { { 30, 30, 215 }, { 110, 110, 140 } };
+
+    GRAPH* graph = game->graph;
+    mCW_Ovl_c* cpwarning_ovl = submenu->overlay->cpwarning_ovl;
+    f32 scale = cpwarning_ovl->scale;
+    f32 x = 160.0f - 112.0f * scale;
+    f32 y = 120.0f - 56.0f * scale;
+    u8* color;
+
+    submenu->overlay->set_char_matrix_proc(game->graph);
+
+    y += 28.0f * scale;
+    mFont_SetLineStrings(game, mCW_mes0, sizeof(mCW_mes0), x + 54.0f * scale, y, 95, 20, 20, 255, FALSE, TRUE, scale,
+                         scale, mFont_MODE_POLY);
+
+    y += 24.0f * scale;
+    mFont_SetLineStrings(game, mCW_mes1, sizeof(mCW_mes1), x + 30.0f * scale, y, 95, 20, 20, 255, FALSE, TRUE, scale,
+                         scale, mFont_MODE_POLY);
+
+    y += 24.0f * scale;
+    color = color_table[cpwarning_ovl->diary_edit_mode];
+    mFont_SetLineStrings(game, mCW_yes_mes, sizeof(mCW_yes_mes), x + 94.0f * scale, y, color[0], color[1], color[2],
+                         255, FALSE, TRUE, scale, scale, mFont_MODE_POLY);
+    color = color_table[!cpwarning_ovl->diary_edit_mode];
+    mFont_SetLineStrings(game, mCW_no_mes, sizeof(mCW_no_mes), x + 133.0f * scale, y, color[0], color[1], color[2], 255,
+                         FALSE, TRUE, scale, scale, mFont_MODE_POLY);
+}
+
+static void mCW_cpwarning_ovl_draw(Submenu* submenu, GAME* game) {
+    mSM_MenuInfo_c* menu_info = &submenu->overlay->menu_info[mSM_OVL_CPWARNING];
+
+    menu_info->pre_draw_func(submenu, game);
+    mCW_set_frame_dl(submenu, game, menu_info);
+    mCW_set_character_dl(submenu, game, menu_info);
+}
+
+extern void mCW_cpwarning_ovl_set_proc(Submenu* submenu) {
+    Submenu_Overlay_c* overlay = submenu->overlay;
+
+    overlay->menu_control.menu_move_func = &mCW_cpwarning_ovl_move;
+    overlay->menu_control.menu_draw_func = &mCW_cpwarning_ovl_draw;
+}
+
+static void mCW_cpwarning_ovl_init(Submenu* submenu, mSM_MenuInfo_c* menu_info) {
+    mCW_Ovl_c* cpwarning_ovl = submenu->overlay->cpwarning_ovl;
+
+    submenu->overlay->menu_control.animation_flag = FALSE;
+    menu_info->proc_status = mSM_OVL_PROC_MOVE;
+    menu_info->next_proc_status = mSM_OVL_PROC_PLAY;
+    cpwarning_ovl->_06 = 30;
+    cpwarning_ovl->scale = 0.0f;
+    cpwarning_ovl->_0C = 0.0f;
+    cpwarning_ovl->move_dir = mCW_MOVE_IN;
+    sAdo_SysTrgStart(MONO(NA_SE_3));
+    cpwarning_ovl->diary_edit_mode = Now_Private->calendar.edit;
+}
+
+extern void mCW_cpwarning_ovl_construct(Submenu* submenu) {
+    Submenu_Overlay_c* overlay = submenu->overlay;
+    mSM_MenuInfo_c* menu_info = &overlay->menu_info[mSM_OVL_CPWARNING];
+
+    if (overlay->cpwarning_ovl == NULL) {
+        mem_clear((u8*)&cpwarning_ovl_data, sizeof(cpwarning_ovl_data), 0);
+        overlay->cpwarning_ovl = &cpwarning_ovl_data;
+    }
+
+    mCW_cpwarning_ovl_init(submenu, menu_info);
+    mCW_cpwarning_ovl_set_proc(submenu);
+}
+
+extern void mCW_cpwarning_ovl_destruct(Submenu* submenu) {
+    submenu->overlay->cpwarning_ovl = NULL;
+}