diff --git a/src/decorators/to-kxml.ts b/src/decorators/to-kxml.ts
index e04faaf..06d2668 100644
--- a/src/decorators/to-kxml.ts
+++ b/src/decorators/to-kxml.ts
@@ -58,19 +58,22 @@ function serializeObject(obj: Object, name: string, linePrefix: string = '') {
     .filter(v => v[0].startsWith('$'))
     .map(v => [v[0].substring(1), v[1]]);
 
-  for (const attr of attrs) {
-    output += ` ${attr[0]}="${_.escape(attr[1])}"`;
-  }
-
   // handle kxml value shit
   const value = entries.find(v => v[0] == '__value');
 
   if (value && value[1] instanceof Array) {
-    output += ` __count="${value[1].length}"`;
+    attrs.push(['__count', value[1].length]);
   }
 
   if (value && value[1] instanceof Buffer) {
-    output += ` __size="${value[1].length}"`;
+    attrs.push(['__size', value[1].length]);
+  }
+
+  // the kbinxml library had issue when serializing non-ordered stuff
+  attrs.sort((a, b) => a[0] < b[0] ? 1 : (a[0] > b[0] ? -1 : 0));
+
+  for (const attr of attrs) {
+    output += ` ${attr[0]}="${_.escape(attr[1])}"`;
   }
 
   output += '>';
@@ -88,7 +91,8 @@ function serializeObject(obj: Object, name: string, linePrefix: string = '') {
       .join(' ');
   } else {
     const elements = entries
-      .filter(v => !v[0].startsWith('$'));
+      .filter(v => !v[0].startsWith('$'))
+      .sort((a, b) => a[0] < b[0] ? 1 : (a[0] > b[0] ? -1 : 0));
 
     if (elements.length) {
       output += '\n';
diff --git a/src/services/IIDX31music/index.ts b/src/services/IIDX31music/index.ts
index 8bd9cee..ac804d4 100644
--- a/src/services/IIDX31music/index.ts
+++ b/src/services/IIDX31music/index.ts
@@ -1,4 +1,5 @@
 import { serviceKxml } from "../../decorators/to-kxml.js";
+// import { v } from "../../utils/kxml-value.js";
 
 const resp = serviceKxml('IIDX31music');
 
@@ -8,12 +9,44 @@ export default class {
     return {
       $expire: 1800,
       c: [
-        // {
-        //     $__type: 's32',
-        //     $mid: 11451,
-        //     __value: new Array(20).fill(-1),
-        // }
+        // v.s32('114514', { mid: 11451 }),
       ],
     };
   }
+
+  @resp('reg')
+  async reg() {
+    return {
+      $clid: 0,
+      $crate: 0,
+      $frate: 0,
+      $mid: 0,
+      $rankside: 0,
+      $status: 0,
+      shopdata: {
+        $rank: 252,
+      },
+      ranklist: {
+        $total_user_num: 1,
+        data: [{
+          $clflg: 4,
+          $dgrade: -1,
+          $sgrade: -1,
+          $iidx_id: '114514',
+          $myFlg: '0',
+          $name: 'MK_',
+          $opname: '雷窝',
+          $pid: 0,
+          $rnum: 0,
+          $score: 0,
+          $update: 0,
+          $body: 0,
+          $face: 0,
+          $hair: 0,
+          $hand: 0,
+          $head: 0,
+        }]
+      }
+    }
+  }
 }
diff --git a/src/utils/kxml-value.ts b/src/utils/kxml-value.ts
index 4f16cdb..619d2b3 100644
--- a/src/utils/kxml-value.ts
+++ b/src/utils/kxml-value.ts
@@ -15,13 +15,23 @@ export type ValueTypes = 's8' |
   'time';
 
 function vg(type: ValueTypes) {
-  return (value: unknown) => ({
-    $__type: type,
-    __value: value,
-  });
+  return (value: unknown, attrs?: object) => {
+    const result = {
+      $__type: type,
+      __value: value,
+    };
+
+    if (attrs) {
+      for (const key in attrs) {
+        result['$' + key] = attrs[key];
+      }
+    }
+
+    return attrs;
+  };
 }
 
-export const v: Record<ValueTypes, (value: unknown) => object> = {
+export const v: Record<ValueTypes, (value: unknown, attrs?: object) => object> = {
   s8: vg('s8'),
   u8: vg('u8'),
   s16: vg('s16'),