diff --git a/src/sys/ags.cpp b/src/sys/ags.cpp
index 66167fd..ac9b42a 100644
--- a/src/sys/ags.cpp
+++ b/src/sys/ags.cpp
@@ -15,14 +15,6 @@ extern SDL_Window* g_window;
 extern SDL_Renderer* g_renderer;
 static SDL_Surface* display_surface;
 
-#define SET_BOX(n, c, x1, y1, x2, y2) { \
-	box[n].color = c; \
-	box[n].sx = x1; \
-	box[n].sy = y1; \
-	box[n].ex = x2; \
-	box[n].ey = y2; \
-}
-
 namespace {
 
 const uint32 SCANLINE_ALPHA = 0x38;  // 0-255
@@ -197,28 +189,6 @@ AGS::AGS(const Config& config, const GameId& game_id) : game_id(game_id), dirty(
 
 	init_windows();
 
-	// Eコマンド
-	for(int i = 0; i < 20; i++) {
-//		SET_BOX(i, 0, 0, 0, 631, 399);
-		SET_BOX(i, 0, 0, 0, 639, 399);
-	}
-	if (game_id.sys_ver == 2) {
-		if (game_id.is(GameId::SDPS_TONO) || game_id.is(GameId::SDPS_KAIZOKU)) {
-			SET_BOX(0, 0, 40, 8, 598, 271);
-		} else if (game_id.is(GameId::PROG_FD)) {
-			SET_BOX(0, 0, 64, 13, 407, 289);
-			SET_BOX(1, 0, 24, 298, 111, 390);
-			SET_BOX(2, 0, 0, 0, 639, 307);
-			SET_BOX(3, 0, 0, 0, 319, 399);
-			SET_BOX(4, 0, (16*8), 310, ((77*8)-1), 390);
-			SET_BOX(5, 0, (4*8), 310, ((76*8)-1), 390);
-			SET_BOX(6, 0, (2*8), 317, ((56*8)-1), 389);
-			SET_BOX(7, 15, 64, 13, 407, 289);
-			SET_BOX(8, 0, 0, 0, 319, 399);
-			SET_BOX(9, 0, 320, 0, 639, 40);
-		}
-	}
-
 	// 画面選択
 	src_screen = dest_screen = 0;
 
diff --git a/src/sys/ags.h b/src/sys/ags.h
index 1c0b912..2cea0a5 100644
--- a/src/sys/ags.h
+++ b/src/sys/ags.h
@@ -130,6 +130,10 @@ public:
 		menu_w[index - 1].frame = frame;
 	}
 
+	void set_box(int index, uint8 color, int sx, int sy, int ex, int ey) {
+		box[index - 1] = {color, sx, sy, ex, ey};
+	}
+
 	void load_cursor(int page);
 	void select_cursor();
 	void translate_mouse_coords(int* x, int* y);
@@ -171,16 +175,6 @@ public:
 	bool draw_hankaku;
 	bool draw_menu;
 
-	// ボックス (E, Y7コマンド)
-	typedef struct {
-		uint8 color;
-		int sx;
-		int sy;
-		int ex;
-		int ey;
-	} BOX;
-	BOX box[20];
-
 	// CG表示
 	bool set_cg_dest;
 	int cg_dest_x;
@@ -218,6 +212,16 @@ private:
 	Window text_w[10];
 	void init_windows();
 
+	// Box (E and Y7 commands)
+	struct Box {
+		uint8 color = 0;
+		int sx = 0;
+		int sy = 0;
+		int ex = 639;
+		int ey = 399;
+	};
+	Box box[20];
+
 	Dri acg;
 	const char* bmp_prefix = NULL;
 };
diff --git a/src/sys/ags_draw.cpp b/src/sys/ags_draw.cpp
index 25cff4c..7b0712b 100644
--- a/src/sys/ags_draw.cpp
+++ b/src/sys/ags_draw.cpp
@@ -160,16 +160,11 @@ void AGS::draw_box(int index)
 		return;
 	}
 
-	int sx = box[index - 1].sx;
-	int sy = box[index - 1].sy;
-	int ex = box[index - 1].ex;
-	int ey = box[index - 1].ey;
-	uint8 color = box[index - 1].color;
-
-	if(1 <= index && index <= 10) {
-		box_fill(dest_screen, sx, sy, ex, ey, color);
-	} else if(11 <= index && index <= 20) {
-		box_line(dest_screen, sx, sy, ex, ey, color);
+	Box& b = box[index - 1];
+	if (1 <= index && index <= 10) {
+		box_fill(dest_screen, b.sx, b.sy, b.ex, b.ey, b.color);
+	} else if (11 <= index && index <= 20) {
+		box_line(dest_screen, b.sx, b.sy, b.ex, b.ey, b.color);
 	}
 }
 
diff --git a/src/sys/nact_sys2.cpp b/src/sys/nact_sys2.cpp
index 588dc6f..f35ed31 100644
--- a/src/sys/nact_sys2.cpp
+++ b/src/sys/nact_sys2.cpp
@@ -19,7 +19,7 @@ namespace {
 
 class NACT_Sys2 : public NACT {
 public:
-	NACT_Sys2(const Config& config, const GameId& game_id) : NACT(config, game_id) {}
+	NACT_Sys2(const Config& config, const GameId& game_id);
 
 protected:
 	void cmd_branch() override;
@@ -82,6 +82,25 @@ private:
 #define WAIT(tm) do { wait_impl(tm); if (terminate) return; } while(0)
 #define WAIT_KEYQUIT(tm) do { wait_keyquit_impl(tm); if (terminate) return; } while(0)
 
+NACT_Sys2::NACT_Sys2(const Config& config, const GameId& game_id)
+	: NACT(config, game_id)
+{
+	if (game_id.is(GameId::SDPS_TONO) || game_id.is(GameId::SDPS_KAIZOKU)) {
+		ags->set_box(0, 0, 40, 8, 598, 271);
+	} else if (game_id.is(GameId::PROG_FD)) {
+		ags->set_box(0, 0, 64, 13, 407, 289);
+		ags->set_box(1, 0, 24, 298, 111, 390);
+		ags->set_box(2, 0, 0, 0, 639, 307);
+		ags->set_box(3, 0, 0, 0, 319, 399);
+		ags->set_box(4, 0, (16*8), 310, ((77*8)-1), 390);
+		ags->set_box(5, 0, (4*8), 310, ((76*8)-1), 390);
+		ags->set_box(6, 0, (2*8), 317, ((56*8)-1), 389);
+		ags->set_box(7, 15, 64, 13, 407, 289);
+		ags->set_box(8, 0, 0, 0, 319, 399);
+		ags->set_box(9, 0, 320, 0, 639, 40);
+	}
+}
+
 void NACT_Sys2::cmd_branch()
 {
 	int condition = cali();
diff --git a/src/sys/nact_sys3.cpp b/src/sys/nact_sys3.cpp
index 9331ad9..b9427b5 100644
--- a/src/sys/nact_sys3.cpp
+++ b/src/sys/nact_sys3.cpp
@@ -292,11 +292,11 @@ void NACT_Sys3::cmd_e()
 
 	TRACE("E %d,%d,%d,%d,%d,%d:", index, color, sx, sy, ex, ey);
 
-	ags->box[index - 1].color = color;
-	ags->box[index - 1].sx = column ? sx * 8 : sx;
-	ags->box[index - 1].sy = sy;
-	ags->box[index - 1].ex = column ? ex * 8 - 1 : ex; // ?
-	ags->box[index - 1].ey = ey;
+	if (column) {
+		sx = sx * 8;
+		ex = ex * 8 - 1;
+	}
+	ags->set_box(index, color, sx, sy, ex, ey);
 }
 
 void NACT_Sys3::cmd_g()