diff --git a/public/src/js/songselect.js b/public/src/js/songselect.js
index f213554..08a306b 100644
--- a/public/src/js/songselect.js
+++ b/public/src/js/songselect.js
@@ -243,6 +243,13 @@ class SongSelect{
 					skin: this.songSkin.customSettings,
 					action: "baisoku",
 				});
+
+				this.songs.push({
+					title: "ドロン",
+					skin: this.songSkin.customSettings,
+					action: "doron",
+				});
+
 		this.songs.push({
 			title: strings.back,
 			skin: this.songSkin.back,
@@ -920,6 +927,20 @@ class SongSelect{
 								}
 								localStorage.setItem("baisoku", baisoku.toString());
 							}, 100);
+						} else if (currentSong.action === "doron") {
+							this.playSound("se_don");
+							setTimeout(() => {
+								let doron = localStorage.getItem("doron") ?? "false";
+								const input = prompt("ドロンを有効にするには\"true\"を入力してね！", doron);
+								if (input === null) {
+									// キャンセル
+								} else if (input === "") {
+									input = "false";
+								} else {
+									doron = input;
+								}
+								localStorage.setItem("doron", doron);
+							}, 100);
 						}
 		}
 		this.pointer(false)
diff --git a/public/src/js/view.js b/public/src/js/view.js
index 45e2b96..582ecf5 100644
--- a/public/src/js/view.js
+++ b/public/src/js/view.js
@@ -1705,7 +1705,10 @@
 			ctx.fill()
 			ctx.stroke()
 		}
-		if(!fade || fade < 1){
+
+		const doron = localStorage.getItem("doron") ?? "false";
+
+		if((!fade || fade < 1) && doron === "false"){
 			// Main circle
 			ctx.fillStyle = fill
 			ctx.beginPath()