diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..184ca6f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "tetyou"]
+	path = tetyou
+	url = https://github.com/hoochanlon/tetyou
diff --git a/tetyou b/tetyou
new file mode 160000
index 0000000..50401c7
--- /dev/null
+++ b/tetyou
@@ -0,0 +1 @@
+Subproject commit 50401c7f488cf5c58d1d1a8859000eb285c8c544