diff --git a/src/ags.c b/src/ags.c
index fc32ea0..d071cc7 100644
--- a/src/ags.c
+++ b/src/ags.c
@@ -117,11 +117,18 @@ void ags_init(const char *render_driver) {
 	cg_init();
 }
 
-void ags_remove() {
+void ags_remove(void) {
 	ags_autorepeat(TRUE);
 	sdl_Remove();
 }
 
+void ags_reset(void) {
+	nact->ags.mouse_movesw = 2;
+	nact->ags.eventcb = NULL;
+	initPal(&pal_256);
+	cg_reset();
+}
+
 void ags_setWorldSize(int width, int height, int depth) {
 	nact->ags.world_size.width  = width;
 	nact->ags.world_size.height = height;
diff --git a/src/ags.h b/src/ags.h
index 1ddfad3..159f9e2 100644
--- a/src/ags.h
+++ b/src/ags.h
@@ -126,8 +126,9 @@ typedef struct _ags ags_t;
 
 
 /* 初期化関係 */
-extern void ags_init(const char *render_driver);
-extern void ags_remove();
+void ags_init(const char *render_driver);
+void ags_remove(void);
+void ags_reset(void);
 
 /* ウィンド関係 */
 extern void ags_setWorldSize(int width, int height, int depth);
diff --git a/src/cg.c b/src/cg.c
index e4f61dc..ad56049 100644
--- a/src/cg.c
+++ b/src/cg.c
@@ -41,20 +41,20 @@
 #include "cache.h"
 
 /* VSPのパレット展開バンク */
-int cg_vspPB = -1;
+int cg_vspPB;
 /* cg,palette 展開フラグ (funciotn flag) */
-int cg_fflg = 7;
+int cg_fflg;
 /* CGをロードした回数を書き込む変数 */
-int *cg_loadCountVar = NULL;
+int *cg_loadCountVar;
 /* Brightness (PD command) */
-int cg_brightness = 255;
+int cg_brightness;
 
 #define GCMD_EXTRACTCG(c)    ((c) & 0x01)
 #define GCMD_SET_PALETTE(c)  ((c) & 0x02)
 #define GCMD_LOAD_PALETTE(c) ((c) & 0x04)
 
 /* CG表示位置に関する情報 */
-static CG_WHERETODISP loc_policy = OFFSET_NOMOVE, loc_policy0;
+static CG_WHERETODISP loc_policy, loc_policy0;
 static MyPoint        loc_where, loc_where0;
 
 /* extracted cg data cache control object */
@@ -244,8 +244,19 @@ static cgdata *loader(int no) {
 /*
  * Initilize cache
 */
-void cg_init() {
+void cg_init(void) {
 	cacheid = cache_new(cgdata_free);
+	cg_reset();
+}
+
+void cg_reset(void) {
+	cg_vspPB = -1;
+	cg_fflg = 7;
+	cg_loadCountVar = NULL;
+	cg_brightness = 255;
+	loc_policy = loc_policy0 = OFFSET_NOMOVE;
+	memset(&loc_where, 0, sizeof(loc_where));
+	memset(&loc_where0, 0, sizeof(loc_where0));
 }
 
 /*
diff --git a/src/cg.h b/src/cg.h
index c10ec33..d5c006d 100644
--- a/src/cg.h
+++ b/src/cg.h
@@ -72,7 +72,8 @@ typedef enum {
 	OFFSET_RELATIVE_JC   /* relative location and use til J4 cmd */
 } CG_WHERETODISP;
 
-extern void cg_init();
+extern void cg_init(void);
+extern void cg_reset(void);
 extern void cg_set_display_location(int x, int y, CG_WHERETODISP policy);
 extern void cg_load(int no, int flg);
 extern void cg_load_with_alpha(int cgno, int shadowno);
diff --git a/src/cmd2F.c b/src/cmd2F.c
index 5c57af9..33540b8 100644
--- a/src/cmd2F.c
+++ b/src/cmd2F.c
@@ -1527,5 +1527,11 @@ void commands2F8B() {
 
 void commands2F8C() {
 	DEBUG_COMMAND("sysReset:\n");
-	sys_reset();
+	nact_quit(TRUE);
+}
+
+void cmd2F_reset(void) {
+	cb_sel_init_page = 0;
+	cb_sel_init_address = 0;
+	memset(fnctbl, 0, sizeof(fnctbl));
 }
diff --git a/src/cmdv.c b/src/cmdv.c
index 33e4eee..408ceac 100644
--- a/src/cmdv.c
+++ b/src/cmdv.c
@@ -964,7 +964,7 @@ static void va_updatePreArea(int i) {
 	ags_updateArea(VAcmd[i].preX, VAcmd[i].preY, VAcmd[i].unitWidth, VAcmd[i].unitHeight);
 }
 
-void va_animation() {
+void va_animation(void) {
 	int i;
 	int x, y, w, h;
 
@@ -1050,3 +1050,29 @@ static void va_update() {
 	status_check_count = 0;
 #endif
 }
+
+void va_reset(void) {
+	free(UnitMap);
+	UnitMap = NULL;
+
+	nPageNum = 0;
+	x0Map = 0;
+	y0Map = 0;
+	cxMap = 0;
+	cyMap = 0;
+	cxUnit = 0;
+	cyUnit = 0;
+
+	free(_vh_src);
+	free(_vh_dst);
+	_vh_src = vh_src = NULL;
+	_vh_dst = vh_dst = NULL;
+	vh_cnt_src = 0;
+	vh_cnt_dst = 0;
+
+	free(srcimg);
+	srcimg = NULL;
+
+	memset(VAcmd, 0, sizeof(VAcmd));
+	inAnimation = FALSE;
+}
diff --git a/src/cmdz.c b/src/cmdz.c
index 401a7ef..d1fc7db 100644
--- a/src/cmdz.c
+++ b/src/cmdz.c
@@ -566,3 +566,7 @@ void commandZU() {
 
 	DEBUG_COMMAND("ZU %d:\n",sw);
 }
+
+void cmdz_reset(void) {
+	memset(counters, 0, sizeof(counters));
+}
diff --git a/src/debugger.c b/src/debugger.c
index 8a1cafa..be95e3b 100644
--- a/src/debugger.c
+++ b/src/debugger.c
@@ -51,9 +51,9 @@ void dbg_init(const char *symbols_path, boolean use_dap) {
 	dbg_impl->init(symbols_path);
 }
 
-void dbg_quit(bool restart) {
+void dbg_quit(void) {
 	if (dbg_impl)
-		dbg_impl->quit(restart);
+		dbg_impl->quit();
 }
 
 int dbg_lookup_var(const char *name) {
diff --git a/src/debugger.h b/src/debugger.h
index 3cb3a00..f8a5c55 100644
--- a/src/debugger.h
+++ b/src/debugger.h
@@ -42,7 +42,7 @@ extern DebuggerState dbg_state;
 
 #define dbg_trapped() (dbg_state != DBG_RUNNING)
 void dbg_init(const char *symbols_path, boolean use_dap);
-void dbg_quit(bool restart);
+void dbg_quit(void);
 void dbg_main(int bp_no);
 void dbg_onsleep(void);
 BYTE dbg_handle_breakpoint(int page, int addr);
@@ -52,7 +52,7 @@ boolean dbg_console_vprintf(int lv, const char *format, va_list ap);
 
 #define dbg_trapped() false
 #define dbg_init(symbols_path, use_dap)
-#define dbg_quit(restart)
+#define dbg_quit()
 #define dbg_main(bp_no)
 #define dbg_onsleep()
 #define dbg_handle_breakpoint(page, addr) BREAKPOINT
diff --git a/src/debugger_cui.c b/src/debugger_cui.c
index f79cc78..b5d0ce0 100644
--- a/src/debugger_cui.c
+++ b/src/debugger_cui.c
@@ -344,7 +344,7 @@ static void dbg_cui_init(const char *symbols_path) {
 	dbg_state = DBG_STOPPED_ENTRY;
 }
 
-static void dbg_cui_quit(bool restart) {
+static void dbg_cui_quit(void) {
 }
 
 typedef struct {
diff --git a/src/debugger_dap.c b/src/debugger_dap.c
index 9170489..293448a 100644
--- a/src/debugger_dap.c
+++ b/src/debugger_dap.c
@@ -82,14 +82,10 @@ static void emit_initialized_event(void) {
 	send_json(event);
 }
 
-static void emit_terminated_event(bool restart) {
-	cJSON *event = cJSON_CreateObject(), *body;
+static void emit_terminated_event(void) {
+	cJSON *event = cJSON_CreateObject();
 	cJSON_AddStringToObject(event, "type", "event");
 	cJSON_AddStringToObject(event, "event", "terminated");
-	if (restart) {
-		cJSON_AddItemToObjectCS(event, "body", body = cJSON_CreateObject());
-		cJSON_AddBoolToObject(body, "restart", true);
-	}
 	send_json(event);
 }
 
@@ -590,10 +586,8 @@ static void dbg_dap_init(const char *path) {
 	}
 }
 
-static void dbg_dap_quit(bool restart) {
-	emit_terminated_event(restart);
-	if (restart)
-		exit(0); // The front end will restart xsystem35, so we can just exit.
+static void dbg_dap_quit(void) {
+	emit_terminated_event();
 }
 
 static void dbg_dap_repl(int bp_no) {
diff --git a/src/debugger_private.h b/src/debugger_private.h
index a7fcfd0..77acd16 100644
--- a/src/debugger_private.h
+++ b/src/debugger_private.h
@@ -55,7 +55,7 @@ typedef struct {
 
 typedef struct {
 	void (*init)(const char *symbols_path);
-	void (*quit)(bool restart);
+	void (*quit)(void);
 	void (*repl)(int bp_no);
 	void (*onsleep)(void);
 	void (*console_output)(int lv, const char *output);
diff --git a/src/menu.h b/src/menu.h
index d842602..480928c 100644
--- a/src/menu.h
+++ b/src/menu.h
@@ -47,6 +47,7 @@ typedef struct inputnum_param {
 
 extern void menu_open(void);
 extern void menu_quitmenu_open(void);
+extern void menu_resetmenu_open(void);
 extern boolean menu_inputstring(INPUTSTRING_PARAM *);
 extern boolean menu_inputstring2(INPUTSTRING_PARAM *);
 extern boolean menu_inputnumber(INPUTNUM_PARAM *);
diff --git a/src/menu_callback.c b/src/menu_callback.c
index 1ec82b2..c6d8755 100644
--- a/src/menu_callback.c
+++ b/src/menu_callback.c
@@ -178,7 +178,7 @@ on_button5_clicked                     (GtkButton       *button,
                                         gpointer         user_data)
 {
 	menu_ok_exit = TRUE;
-	nact->is_quit = TRUE;
+	nact_quit(FALSE);
 	nact->popupmenu_opened = FALSE;
 }
 
diff --git a/src/menu_sdl.c b/src/menu_sdl.c
index d758f55..c34ed61 100644
--- a/src/menu_sdl.c
+++ b/src/menu_sdl.c
@@ -56,8 +56,30 @@ void menu_quitmenu_open(void) {
 		return;
 	}
 	if (buttonid == 1) {
-		nact->is_quit = TRUE;
-		nact->wait_vsync = TRUE;
+		nact_quit(FALSE);
+	}
+}
+
+void menu_resetmenu_open(void) {
+	const SDL_MessageBoxButtonData buttons[] = {
+		{ SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, 1, "Restart" },
+		{ SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT, 0, "Cancel" },
+	};
+	const SDL_MessageBoxData messagebox_data = {
+		.flags = SDL_MESSAGEBOX_INFORMATION,
+		.window = sdl_window,
+		.title = "Confirm",
+		.message = "Restart the game?",
+		.numbuttons = SDL_arraysize(buttons),
+		.buttons = buttons,
+	};
+	int buttonid = 0;
+	if (SDL_ShowMessageBox(&messagebox_data, &buttonid) < 0) {
+		WARNING("error displaying message box");
+		return;
+	}
+	if (buttonid == 1) {
+		nact_quit(TRUE);
 	}
 }
 
diff --git a/src/message.c b/src/message.c
index 64771c5..1045428 100644
--- a/src/message.c
+++ b/src/message.c
@@ -47,13 +47,10 @@
 // static Bcom_WindowInfo winInfo = {8,311,616,80,0};
 /* Window枠の種類 */
 static int frameType;
-static int frameCgNoTop;
-static int frameCgNoMid;
-static int frameCgNoBot;
 static int frameDot;
 /* 文字飾りの設定 */
-static int msgDecorateColor   = 0;
-static int msgDecorateType    = 0;
+static int msgDecorateColor;
+static int msgDecorateType;
 /* 現在の文字表示位置 */
 static MyPoint msgcur;
 static boolean nextLineIsAfterKaigyou = FALSE;
@@ -90,6 +87,12 @@ void msg_init() {
 	msg.mg_policyR       = 0;
 	msg.mg_policyA       = 0;
 
+	for (int i = 0; i < MSGWINMAX; i++) {
+		if (msg.wininfo[i].savedimg)
+			ags_delRegion(msg.wininfo[i].savedimg);
+	}
+	memset(msg.wininfo, 0, sizeof(msg.wininfo));
+
 	msg.winno = 1;
 	msg.win = &msg.wininfo[0];
 	msg.wininfo[0].x = 8;
@@ -97,6 +100,13 @@ void msg_init() {
 	msg.wininfo[0].width = 616;
 	msg.wininfo[0].height = 80;
 	msg.wininfo[0].save = TRUE;
+
+	// Private variables
+	msgDecorateColor = 0;
+	msgDecorateType = 0;
+	msgcur.x = 0;
+	msgcur.y = 0;
+	nextLineIsAfterKaigyou = FALSE;
 }
 
 void msg_setFontSize(int size) {
@@ -304,9 +314,6 @@ void msg_openWindow(int W, int C1, int C2, int N, int M) {
 		frameDot = 8;
 		break;
 	case WINDOW_FRAME_CG:
-		frameCgNoTop = C1;
-		frameCgNoMid = C2;
-		frameCgNoBot = N;
 		frameDot     = M;
 		break;
 	default:
diff --git a/src/nact.c b/src/nact.c
index 6811ef7..5b641c9 100644
--- a/src/nact.c
+++ b/src/nact.c
@@ -54,8 +54,6 @@ MG コマンド: 表示時の ZH に依存
 
 */
 
-/* defined by cmdv.c */
-extern void va_animation();
 /* 半角モード */
 static int msg_msgHankakuMode = 0; /* 0:全角 1:半角, 2: 無変換 */
 
@@ -147,18 +145,56 @@ static void nact_callback() {
 	if (nact->popupmenu_opened) {
 		menu_gtkmainiteration();
 	}
-	if (nact->is_quit) {
+	if (nact->is_quit && !nact->restart) {
 		sys_exit(0);
 	}
 }
 
 void nact_init() {
-	nact->ags.mouse_movesw = 2;
 	nact->is_quit = FALSE;
+	nact->restart = FALSE;
+	nact->callback = nact_callback;
 	nact->is_va_animation = FALSE;
 	nact->is_cursor_animation = FALSE;
 	nact->is_message_locked = FALSE;
+	nact->encoding = SHIFT_JIS;
+
+	free(nact->game_title_utf8);
+	nact->game_title_utf8 = NULL;
+	nact->scenario_version = 0;
+
+	nact->datatbl_addr = NULL;
+	nact->fnc_return_value = 0;
+
+	nact->messagewait_enable = FALSE;
+	nact->messagewait_cancelled = FALSE;
+	nact->messagewait_time = 0;
+	nact->messagewait_cancel = FALSE;
+
+	msg_init();
 	nact->is_msg_out = TRUE;
-	nact->callback = nact_callback;
+	nact->msgout = NULL;
+
+	sel_init();
+
 	nact->patch_ec = 1;  // TODO: revisit
+	nact->patch_emen = 0;
+	nact->patch_g0 = 0;
+
+	msg_msgHankakuMode = 0;
+}
+
+void nact_reset(void) {
+	nact_init();
+	sl_reinit();
+	v_reset();
+	va_reset();
+	cmdz_reset();
+	cmd2F_reset();
+}
+
+void nact_quit(boolean restart) {
+	nact->is_quit = TRUE;
+	nact->restart = restart;
+	nact->wait_vsync = TRUE;
 }
diff --git a/src/nact.h b/src/nact.h
index 9e6dc8f..81676db 100644
--- a/src/nact.h
+++ b/src/nact.h
@@ -46,16 +46,26 @@ extern void sys_addMsg(const char *str);
 extern void sys_setHankakuMode(int mode);
 extern void sys_setCharacterEncoding(CharacterEncoding encoding);
 
-// extern boolean sys_nact_engine();
 extern void nact_main();
 extern void nact_init();
+extern void nact_reset(void);
+extern void nact_quit(boolean restart);
 
 // cmd_check.c
 extern void exec_command(void);
 
+// cmdv.c
+void va_animation(void);
+void va_reset(void);
+// cmdz.c
+void cmdz_reset(void);
+// cmd2F.c
+void cmd2F_reset(void);
+
 typedef struct {
 	/* general */
 	boolean   is_quit;             /* quit command */
+	boolean   restart;
 	void     (*callback)(void);    /* main の callback */
 	boolean   is_va_animation;     /* VA command working */
 	boolean   is_cursor_animation; /* animation cursor working */
@@ -72,10 +82,7 @@ typedef struct {
 	int fnc_return_value; /* 関数の戻り値として返す値 (~0,cali:で渡す値) */
 	
 	/* key wait */
-	int     waittime;
-	int     waitcancel_key;
-	int     waitcancel_key_mask;
-	boolean waitcancel_enabled;
+	int     waitcancel_key;  // TODO: remove this
 	
 	/* message wait */
 	boolean messagewait_enable;
diff --git a/src/scenario.c b/src/scenario.c
index a5eec95..9acd5fd 100644
--- a/src/scenario.c
+++ b/src/scenario.c
@@ -69,6 +69,7 @@ boolean sl_init(void) {
 	labelCallCnt = 0;
 	pageCallCnt = 0;
 	labelCallCnt_afterPageCall = 0;
+	dataPushCnt = 0;
 	return TRUE;
 }
 
diff --git a/src/sdl_cursor.c b/src/sdl_cursor.c
index 3630443..594a935 100644
--- a/src/sdl_cursor.c
+++ b/src/sdl_cursor.c
@@ -133,6 +133,8 @@ boolean sdl_cursorNew(BYTE* data, int no, CursorImage *cursorImage, TCursorDirEn
 		}
 	}
 	
+	if (cursor[no])
+		SDL_FreeCursor(cursor[no]);
 	cursor[no] = SDL_CreateCursor(buf3, buf4, 32, 32, cursordirentry->wxHotspot, cursordirentry->wyHotspot);
 	
 	free(buf1);
diff --git a/src/selection.c b/src/selection.c
index 75848f5..1b5b587 100644
--- a/src/selection.c
+++ b/src/selection.c
@@ -53,9 +53,9 @@ static char elm[ELEMENT_MAX][ELEMENT_LENGTH];
 /* 選択したときに返す値 */
 static int elmv[ELEMENT_MAX];
 /* 現在登録中の選択肢の番号 */
-static int regnum = 0;
+static int regnum;
 /* 選択肢の要素の最大長さ */
-static int maxElementLength = 0;
+static int maxElementLength;
 /* 選択肢ウィンド退避 */
 static MyRectangle saveArea;
 /* 選択ウィンドの退避用 */
@@ -69,7 +69,7 @@ static int cb_select_address;
 static int cb_cancel_page;
 static int cb_cancel_address;
 /* 選択肢 window を開いた時のマウスカーソルの動作 */
-static int default_element = 1;
+static int default_element;
 /* 最後に選んだ選択肢の要素番号 */
 static int last_selected_element;
 /* キーボードによる選択操作用 */
@@ -110,6 +110,12 @@ void sel_init() {
 	sel.WinResizeWidth  = FALSE;
 	sel.WinResizeHeight = TRUE;
 
+	for (int i = 0; i < SELWINMAX; i++) {
+		if (sel.wininfo[i].savedimg)
+			ags_delRegion(sel.wininfo[i].savedimg);
+	}
+	memset(sel.wininfo, 0, sizeof(sel.wininfo));
+
 	sel.winno = 1;
 	sel.win = &sel.wininfo[0];
 	sel.wininfo[0].x = 464;
@@ -120,6 +126,27 @@ void sel_init() {
 	
 	/* 選択肢を登録中 */
 	sel.in_setting = FALSE;
+
+	// Private variables
+	memset(elm, 0, sizeof(elm));
+	memset(elmv, 0, sizeof(elmv));
+	regnum = 0;
+	maxElementLength = 0;
+
+	if (saveimg) {
+		ags_delRegion(saveimg);
+		saveimg = NULL;
+	}
+	if (saveimg2) {
+		ags_delRegion(saveimg2);
+		saveimg2 = NULL;
+	}
+	cb_select_page = 0;
+	cb_select_address = 0;
+	cb_cancel_page = 0;
+	cb_cancel_address = 0;
+	default_element = 1;
+	last_selected_element = 0;
 }
 
 /* 登録された選択肢の個数を削減する */
diff --git a/src/system.h b/src/system.h
index 940424b..3e717fc 100644
--- a/src/system.h
+++ b/src/system.h
@@ -30,7 +30,6 @@
 extern void sys_error(char *format, ...);    /* show nessafe and exit system */
 extern void sys_exit(int code);              /* exit system with code */
 extern void sys_message(int lv, char *format, ...);  /* show various message */
-extern void sys_reset();
 
 /*
  DEBUGLEVEL
diff --git a/src/variable.c b/src/variable.c
index f034089..ebfa392 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -47,8 +47,8 @@ double longVar[SYSVARLONG_MAX];
 /* 文字列変数 */
 static char **strVar;
 /* 文字列変数の属性(最大,1つあたりの大きさ) */
-int strvar_cnt = STRVAR_MAX;
-int strvar_len = STRVAR_LEN;
+int strvar_cnt;
+int strvar_len;
 
 int preVarPage;      /* 直前にアクセスした変数のページ */
 int preVarIndex;     /* 直前にアクセスした変数のINDEX */
@@ -175,12 +175,28 @@ extern int svar_maxindex(void) {
 }
 
 /* 変数の初期化 */
-extern boolean v_initVars() {
-	strVar = calloc(STRVAR_MAX, sizeof(char *));
-	if (strVar == NULL) {
-		NOMEMERR();
+void v_init(void) {
+	svar_init(STRVAR_MAX - 1, STRVAR_LEN);
+}
+
+void v_reset(void) {
+	memset(sysVar, 0, sizeof(sysVar));
+	memset(attributes, 0, sizeof(attributes));
+	memset(longVar, 0, sizeof(longVar));
+
+	for (int i = 0; i < ARRAYVAR_PAGEMAX; i++) {
+		if (arrayVarBuffer[i].value)
+			free(arrayVarBuffer[i].value);
 	}
-	return true;
+	memset(arrayVarBuffer, 0, sizeof(arrayVarBuffer));
+
+	for (int i = 0; i < strvar_cnt; i++) {
+		if (strVar[i]) {
+			free(strVar[i]);
+			strVar[i] = NULL;
+		}
+	}
+	svar_init(STRVAR_MAX - 1, STRVAR_LEN);
 }
 
 /* 文字変数への代入 */
diff --git a/src/variable.h b/src/variable.h
index 2633690..a814cec 100644
--- a/src/variable.h
+++ b/src/variable.h
@@ -53,7 +53,8 @@ boolean v_allocateArrayBuffer(int page, int size, boolean saveflag);
 boolean v_defineArrayVar(int datavar, int *pointvar, int offset, int page);
 boolean v_releaseArrayVar(int datavar);
 boolean v_getArrayBufferStatus(int page);
-boolean v_initVars();
+void v_init(void);
+void v_reset(void);
 
 void svar_init(int max_index, int len);
 int svar_maxindex(void);
diff --git a/src/win/menubar.c b/src/win/menubar.c
index a57dc58..8373846 100644
--- a/src/win/menubar.c
+++ b/src/win/menubar.c
@@ -74,6 +74,9 @@ void win_menu_onsyswmevent(SDL_SysWMmsg* msg) {
 		case ID_SCREENSHOT:
 			saveScreenshot();
 			break;
+		case ID_RESTART:
+			menu_resetmenu_open();
+			break;
 		case ID_EXIT:
 			menu_quitmenu_open();
 			break;
diff --git a/src/win/resources.h b/src/win/resources.h
index b4a08f0..e1122bc 100644
--- a/src/win/resources.h
+++ b/src/win/resources.h
@@ -29,7 +29,8 @@
 #define IDS_CHOOSE_GAME_FOLDER 1001
 
 #define ID_SCREENSHOT          40001
-#define ID_EXIT                40002
+#define ID_RESTART             40002
+#define ID_EXIT                40003
 #define ID_SCREEN_WINDOW       40011
 #define ID_SCREEN_FULL         40012
 #define ID_MSGSKIP             40020
diff --git a/src/win/resources.rc b/src/win/resources.rc
index 4e03e61..6738a47 100644
--- a/src/win/resources.rc
+++ b/src/win/resources.rc
@@ -12,6 +12,7 @@ IDR_MENU1 MENU DISCARDABLE
     POPUP "File"
     {
         MENUITEM "Save Screenshot",             ID_SCREENSHOT
+        MENUITEM "Restart",                     ID_RESTART
         MENUITEM "Exit",                        ID_EXIT
     }
     POPUP "Screen"
@@ -45,6 +46,7 @@ IDR_MENU1 MENU DISCARDABLE
     POPUP "ファイル"
     {
         MENUITEM "画面保存",                      ID_SCREENSHOT
+        MENUITEM "再起動",                        ID_RESTART
         MENUITEM "閉じる",                        ID_EXIT
     }
     POPUP "画面"
diff --git a/src/xsystem35.c b/src/xsystem35.c
index 3716c09..93b8e1d 100644
--- a/src/xsystem35.c
+++ b/src/xsystem35.c
@@ -101,10 +101,6 @@ static boolean font_noantialias;
 /* fullscreen on from command line */
 static boolean fs_on;
 
-// for reboot
-static int saved_argc;
-static char **saved_argv;
-
 static void sys35_usage(boolean verbose) {
 	if (verbose) {
 		puts("System35 for X Window System [proj. Rainy Moon]");
@@ -210,7 +206,7 @@ static void sys35_init() {
 	
 	sl_init();
 
-	v_initVars();
+	v_init();
 	
 	ags_init(render_driver);
 
@@ -223,16 +219,13 @@ static void sys35_init() {
 
 	sgenrand(getpid());
 
-	msg_init();
-	sel_init();
-
 	if (nact->files.ain)
 		s39ain_init(nact->files.ain, &nact->ain);
 	msgskip_init(nact->files.msgskip);
 }
 
 static void sys35_remove() {
-	dbg_quit(false);
+	dbg_quit();
 	mus_exit(); 
 	ags_remove();
 #ifdef ENABLE_GTK
@@ -240,15 +233,10 @@ static void sys35_remove() {
 #endif
 }
 
-void sys_reset() {
-	mus_exit();
-	ags_remove();
-#ifdef ENABLE_GTK
-	s39ini_remove();
-#endif
-	dbg_quit(true);  // This may exit().
-	execvp(saved_argv[0], saved_argv);
-	sys_error("exec fail");
+static void sys_reset(void) {
+	nact_reset();
+	ags_reset();
+	mus_reset();
 }
 
 static void sys35_ParseOption(int *argc, char **argv) {
@@ -462,9 +450,6 @@ int main(int argc, char **argv) {
 	sys_set_signalhandler(SIGINT, SIG_IGN);
 #endif
 	
-	saved_argc = argc;
-	saved_argv = argv;
-
 #ifdef __ANDROID__
 	// Handle -gamedir option here so that .xsys35rc is loaded from that directory.
 	if (strcmp(argv[1], "-gamedir") == 0)
@@ -516,7 +501,15 @@ int main(int argc, char **argv) {
 		dbg_init(symbols_path, debugger_mode == DEBUGGER_DAP);
 	}
 
-	nact_main();
+	for (;;) {
+		nact_main();
+		if (nact->restart) {
+			sys_reset();
+		} else {
+			break;
+		}
+	}
+
 #ifdef __EMSCRIPTEN__
 	sdl_sleep(1000000000);
 #endif