diff --git a/game/touhou-intro.ly b/game/touhou-intro.ly
index 5528c63..377a87f 100644
--- a/game/touhou-intro.ly
+++ b/game/touhou-intro.ly
@@ -16,6 +16,7 @@ violin = \new Staff \with {
 	\numericTimeSignature
 	\time 3/4
 
+	\key d \minor
 
 	\repeat volta 2 {
 		d8 g a c' a g |