diff --git a/data/src/main/java/one/nem/kidshift/data/KSActions.java b/data/src/main/java/one/nem/kidshift/data/KSActions.java
index d4161ee..732d810 100644
--- a/data/src/main/java/one/nem/kidshift/data/KSActions.java
+++ b/data/src/main/java/one/nem/kidshift/data/KSActions.java
@@ -1,5 +1,9 @@
 package one.nem.kidshift.data;
 
+import java.util.concurrent.CompletableFuture;
+
+import one.nem.kidshift.model.ParentModel;
+
 /**
  * データの同期など, ユーザーからの操作に基づかない処理を行う
  */
@@ -12,6 +16,6 @@ public interface KSActions {
     /**
      * 親ユーザー情報同期
      */
-    void syncParent();
+    CompletableFuture<ParentModel> syncParent();
 
 }
diff --git a/data/src/main/java/one/nem/kidshift/data/impl/KSActionsImpl.java b/data/src/main/java/one/nem/kidshift/data/impl/KSActionsImpl.java
index b6dbc2a..9cf9f7c 100644
--- a/data/src/main/java/one/nem/kidshift/data/impl/KSActionsImpl.java
+++ b/data/src/main/java/one/nem/kidshift/data/impl/KSActionsImpl.java
@@ -1,17 +1,30 @@
 package one.nem.kidshift.data.impl;
 
+import java.util.concurrent.CompletableFuture;
+
 import javax.inject.Inject;
 
 import one.nem.kidshift.data.KSActions;
 import one.nem.kidshift.data.UserSettings;
+import one.nem.kidshift.data.retrofit.KidShiftApiService;
+import one.nem.kidshift.data.retrofit.model.parent.ParentInfoResponse;
+import one.nem.kidshift.model.ParentModel;
+import one.nem.kidshift.utils.KSLogger;
+import retrofit2.Call;
+import retrofit2.Response;
 
 public class KSActionsImpl implements KSActions {
 
     private UserSettings userSettings;
+    private KidShiftApiService kidShiftApiService;
+    private KSLogger logger;
 
     @Inject
-    public KSActionsImpl(UserSettings userSettings) {
+    public KSActionsImpl(UserSettings userSettings, KidShiftApiService kidShiftApiService, KSLogger logger) {
         this.userSettings = userSettings;
+        this.kidShiftApiService = kidShiftApiService;
+        this.logger = logger;
+        logger.setTag("KSActions");
     }
 
     @Override
@@ -25,7 +38,33 @@ public class KSActionsImpl implements KSActions {
     }
 
     @Override
-    public void syncParent() {
-
+    public CompletableFuture<ParentModel> syncParent() {
+        logger.info("syncParent called and started");
+        return CompletableFuture.supplyAsync(() -> {
+            logger.info("fetching...");
+            Call<ParentInfoResponse> call = kidShiftApiService.getParentInfo();
+            try {
+                Response<ParentInfoResponse> response = call.execute();
+                if (!response.isSuccessful()) {
+                    logger.error("Error fetching parent info: " + response.errorBody().string());
+                    throw new RuntimeException("Error fetching parent info: " + response.errorBody().string());
+                }
+                ParentInfoResponse responseBody = response.body();
+                ParentModel parent = new ParentModel();
+                // TODO: 詰め替えをどこかにまとめる, 他のプロパティも処理する
+                parent.setInternalId(responseBody.getId());
+                parent.setEmail(responseBody.getEmail());
+                parent.setDisplayName(responseBody.getEmail()); // Workaround
+                logger.info("Parent fetched with status: " + response.code());
+                logger.debug("Parent: " + parent);
+                // Save to cache
+                userSettings.getCache().setParent(parent);
+                logger.info("Parent saved to cache");
+                return parent;
+            } catch (Exception e) {
+                logger.error("Error fetching parent info");
+                throw new RuntimeException(e);
+            }
+        });
     }
 }