diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 00000000..1a8b676c
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,5 @@
+Copyright (c) 2024 cubbit (aratama)
+
+Unfortunately, this is my personal project and is not open source.  
+The source code is available for your game-playing and your personal research purposes only.  
+If you would like to use it in a different way, please contact me. :)