diff --git a/.idea/misc.xml b/.idea/misc.xml
index d5d35ec..860da66 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/build.gradle b/app/build.gradle
index cd305c3..85f58fa 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -47,4 +47,5 @@
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
     implementation "com.squareup.retrofit2:retrofit:2.5.0"
     implementation 'com.squareup.retrofit2:converter-jackson:2.5.0'
+    implementation 'com.squareup.retrofit2:converter-scalars:2.1.0'
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
index 5db414a..b353219 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
@@ -1,5 +1,6 @@
 package org.ntlab.acanthus_client.resources.accounts;
 
+import okhttp3.ResponseBody;
 import retrofit2.Call;
 import retrofit2.http.GET;
 
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/Main_menu_ui/home/HomeViewModel.java b/app/src/main/java/org/ntlab/acanthus_client/views/Main_menu_ui/home/HomeViewModel.java
index 537c0bf..2fe991c 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/Main_menu_ui/home/HomeViewModel.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/Main_menu_ui/home/HomeViewModel.java
@@ -1,16 +1,56 @@
 package org.ntlab.acanthus_client.views.Main_menu_ui.home;
 
+import android.os.Bundle;
+import android.widget.EditText;
+
+import org.ntlab.acanthus_client.R;
+import org.ntlab.acanthus_client.entities.AccountTokenJson;
+import org.ntlab.acanthus_client.resources.accounts.HelloWorldRest;
+import org.ntlab.acanthus_client.resources.accounts.LoginRest;
+
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
+import okhttp3.ResponseBody;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+import retrofit2.converter.scalars.ScalarsConverterFactory;
 
 public class HomeViewModel extends ViewModel {
-
+    private EditText editEmailTextView;
     private MutableLiveData<String> mText;
 
+
     public HomeViewModel() {
         mText = new MutableLiveData<>();
-        mText.setValue("This is home fragment");
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/acanthus/")
+                .addConverterFactory(ScalarsConverterFactory.create())
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        final HelloWorldRest helloworld = retrofit.create(HelloWorldRest.class);
+        Call<String> call = helloworld.getHelloWorld();
+        call.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+                if(response.isSuccessful()) {
+                    String res = response.body();
+                    mText.setValue(res.toString());
+                }else{
+                    mText.setValue("False helloworld");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+                mText.setValue("みす helloworld");
+            }
+        });
+
+
     }
 
     public LiveData<String> getText() {