diff --git a/pttodoer/src/main.rs b/pttodoer/src/main.rs
index 8ffe24c..fb9af62 100644
--- a/pttodoer/src/main.rs
+++ b/pttodoer/src/main.rs
@@ -24,6 +24,40 @@ impl Task {
       assert!(false);
       false
    }
+
+   fn get(&self, k: String) -> Option<String> {
+      match self.0.get(k) {
+         Some(v) => Some(
+            serde_yaml::to_string(v)
+            .unwrap()
+            .trim()
+            .to_string()
+         ),
+         None => None,
+      }
+   }
+
+   fn set(&mut self, k: String, v: String) {
+      self.0.insert(
+         serde_yaml::Value::String(k),
+         serde_yaml::Value::String(v)
+      );
+   }
+}
+
+#[cfg(test)]
+mod test_task {
+   use super::*;
+
+   #[test]
+   fn crud() {
+      let mut t = Task::new();
+      t.set("k".to_string(), "v".to_string());
+      assert_eq!(
+         t.get("k".to_string()),
+         Some("v".to_string()),
+      );
+   }
 }
 
 #[derive(Debug)]