diff --git a/forms/about.frm.php b/forms/about.frm.php
index 02a2b5b..26252b3 100644
--- a/forms/about.frm.php
+++ b/forms/about.frm.php
@@ -2,7 +2,7 @@
 <html lang="ja">
     <head>
         <meta charset="utf8" />
-        <link rel="stylesheet" href="./styles/index.css" />
+        <link rel="stylesheet" href="./styles/style.css" />
         <title>ニジカもんすたぁ!! - このサイトについて</title>
     </head>
 
diff --git a/forms/header.frm.php b/forms/header.frm.php
index 27fa293..c3bbf00 100644
--- a/forms/header.frm.php
+++ b/forms/header.frm.php
@@ -1,7 +1,8 @@
 <header>
-    <ul>
+    <ul id="global-menu">
         <li><a href="/top.php">トップ</a></li>
         <li><a href="/products">作品</a></li>
+        <li><a href="/licence.php">社会契約</a></li>
         <li><a href="/about.php">このサイトについて</a></li>
     </ul>
 </header>
diff --git a/forms/licence.frm.php b/forms/licence.frm.php
new file mode 100644
index 0000000..68e98b1
--- /dev/null
+++ b/forms/licence.frm.php
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="ja">
+    <head>
+        <meta charset="utf8" />
+        <link rel="stylesheet" href="./styles/style.css" />
+        <title>ニジカもんすたぁ!! - 社会契約</title>
+    </head>
+
+    <body>
+        <?php require_once './forms/header.frm.php' ?>
+
+        <main>
+            <h1>社会契約</h1>
+        </main>
+
+        <?php require_once './forms/footer.frm.php' ?>
+    </body>
+</html>
+
diff --git a/forms/top.frm.php b/forms/top.frm.php
index b05d491..49dd22e 100644
--- a/forms/top.frm.php
+++ b/forms/top.frm.php
@@ -2,7 +2,7 @@
 <html lang="ja">
     <head>
         <meta charset="utf8" />
-        <link rel="stylesheet" href="./styles/index.css" />
+        <link rel="stylesheet" href="./styles/style.css" />
         <title>ニジカもんすたぁ!! - トップ</title>
     </head>
 
diff --git a/licence.php b/licence.php
new file mode 100644
index 0000000..6e80943
--- /dev/null
+++ b/licence.php
@@ -0,0 +1,4 @@
+<?php
+
+require_once './forms/licence.frm.php';
+
diff --git a/products/forms/index.frm.php b/products/forms/index.frm.php
index 342b95b..5b871e5 100644
--- a/products/forms/index.frm.php
+++ b/products/forms/index.frm.php
@@ -2,7 +2,7 @@
 <html lang="ja">
     <head>
         <meta charset="utf8" />
-        <link rel="stylesheet" href="../styles/index.css" />
+        <link rel="stylesheet" href="../styles/style.css" />
         <title>ニジカもんすたぁ!! - 作品</title>
     </head>
 
diff --git a/products/index.php b/products/index.php
index 0c2e5d4..c765e64 100644
--- a/products/index.php
+++ b/products/index.php
@@ -1,4 +1,4 @@
 <?php
 
-require_once './forms/index.frm';
+require_once './forms/index.frm.php';
 
diff --git a/styles/style.css b/styles/style.css
new file mode 100644
index 0000000..28cb724
--- /dev/null
+++ b/styles/style.css
@@ -0,0 +1,11 @@
+#global-menu
+{
+  display:          flex;
+  justify-content:  space-evenly;
+}
+
+#global-menu > li
+{
+  list-style: none;
+}
+
