diff --git a/AquaNet/src/libs/i18n/en_ref.ts b/AquaNet/src/libs/i18n/en_ref.ts
index a2eb5ab1..4965e789 100644
--- a/AquaNet/src/libs/i18n/en_ref.ts
+++ b/AquaNet/src/libs/i18n/en_ref.ts
@@ -228,6 +228,8 @@ export const EN_REF_SETTINGS = {
   'settings.fields.chusanTeamName.desc': 'Customize the text displayed on the top of your profile.',
   'settings.fields.chusanInfinitePenguins.name': 'Infinite Penguins',
   'settings.fields.chusanInfinitePenguins.desc': 'Set penguin statues for character level prompting to 999.',
+  'settings.fields.chusanUnlock29672999Ultima.name': 'Unlock 2967, 2999 Ultima',
+  'settings.fields.chusanUnlock29672999Ultima.desc': 'Unlocks Ultima difficulty ONLY for musicIds 2967, 2999. Do not use if you don\'t know why you need this.',
   'settings.fields.chusanLvUnlockAll.name': 'Unlock Linked Gates',
   'settings.fields.chusanLvUnlockAll.desc': 'Incurs a long animated sequence, cannot be undone',
   'settings.fields.chusanMatchingReflector.name': 'Matching Server Reflector',
diff --git a/AquaNet/src/libs/i18n/zh.ts b/AquaNet/src/libs/i18n/zh.ts
index 1ee4e638..455053ad 100644
--- a/AquaNet/src/libs/i18n/zh.ts
+++ b/AquaNet/src/libs/i18n/zh.ts
@@ -240,6 +240,8 @@ const zhSettings: typeof EN_REF_SETTINGS = {
   'settings.fields.chusanTeamName.desc': '自定义显示在个人资料顶部的文本。',
   'settings.fields.chusanInfinitePenguins.name': '我是桐谷遥',
   'settings.fields.chusanInfinitePenguins.desc': '将角色界限突破的企鹅雕像数量设置为 999。',
+  'settings.fields.chusanUnlock29672999Ultima.name': '解锁 2967、2999 Ultima',
+  'settings.fields.chusanUnlock29672999Ultima.desc': '仅解锁曲目 2967、2999 的 Ultima 难度。不清楚用途请勿使用。',
   'settings.fields.chusanLvUnlockAll.name': '解锁所有 Linked Gate',
   'settings.fields.chusanLvUnlockAll.desc': '会触发一个很长的动画序列,且无法撤销',
   'settings.fields.chusanMatchingReflector.name': '全国对战 Reflector',
diff --git a/src/main/java/icu/samnyan/aqua/net/db/AquaGameOptions.kt b/src/main/java/icu/samnyan/aqua/net/db/AquaGameOptions.kt
index baba4fc0..98872e2c 100644
--- a/src/main/java/icu/samnyan/aqua/net/db/AquaGameOptions.kt
+++ b/src/main/java/icu/samnyan/aqua/net/db/AquaGameOptions.kt
@@ -43,6 +43,9 @@ class AquaGameOptions(
     @SettingField("chu3")
     var chusanInfinitePenguins: Boolean = false,
 
+    @SettingField("chu3") @Column(name = "chusan_unlock_2967_2999_ultima")
+    var chusanUnlock29672999Ultima: Boolean = false,
+
     @SettingField("chu3-matching")
     var chusanMatchingServer: String = "",
 
diff --git a/src/main/java/icu/samnyan/aqua/sega/chusan/handler/ChusanApis.kt b/src/main/java/icu/samnyan/aqua/sega/chusan/handler/ChusanApis.kt
index ecb1f85f..ea1f549e 100644
--- a/src/main/java/icu/samnyan/aqua/sega/chusan/handler/ChusanApis.kt
+++ b/src/main/java/icu/samnyan/aqua/sega/chusan/handler/ChusanApis.kt
@@ -237,6 +237,13 @@ fun ChusanController.chusanInit() {
                     items.removeAll { it.itemId in penguins }
                     items.addAll(penguins.map { Chu3UserItem(kind, it, 999, true) })
                 }
+
+                if (it.chusanUnlock29672999Ultima && kind == 12) {
+                    val existing = items.map { item -> item.itemId }.toHashSet()
+                    setOf(2967, 2999)
+                        .filterNot { id -> id in existing }
+                        .mapTo(items) { id -> Chu3UserItem(kind, id, 1, true) }
+                }
             }
 
             items
diff --git a/src/main/resources/db/80/V1000_76__chusan_unlock_2967_2999_ultima.sql b/src/main/resources/db/80/V1000_76__chusan_unlock_2967_2999_ultima.sql
new file mode 100644
index 00000000..24812ba2
--- /dev/null
+++ b/src/main/resources/db/80/V1000_76__chusan_unlock_2967_2999_ultima.sql
@@ -0,0 +1,2 @@
+ALTER TABLE aqua_game_options
+    ADD COLUMN chusan_unlock_2967_2999_ultima BIT(1) NOT NULL DEFAULT 0;