diff --git a/to-lower-case/seungyeonchoi.java b/to-lower-case/seungyeonchoi.java
new file mode 100644
index 0000000000..882ce1a81d
--- /dev/null
+++ b/to-lower-case/seungyeonchoi.java
@@ -0,0 +1,11 @@
+class Solution {
+    public String toLowerCase(String s) {
+        return s.toLowerCase();
+    }
+
+    /*
+    * Complexity
+    * - time: O(n)
+    * - space: O(n)
+    */ 
+}