diff --git a/app/src/main/java/com/example/nemophila/Nemophila.java b/app/src/main/java/com/example/nemophila/Nemophila.java
index b48eb3c..37d9e2b 100644
--- a/app/src/main/java/com/example/nemophila/Nemophila.java
+++ b/app/src/main/java/com/example/nemophila/Nemophila.java
@@ -11,8 +11,6 @@
 import java.util.HashSet;
 
 public class Nemophila extends Application {
-    private final int MAX_FILTER = 5;
-
     //アカウントのデータ
     private String name;
     private String uid;
@@ -32,6 +30,7 @@
     //フィルターのデータ
     private HashSet<String> selectGenres = new HashSet<>();
     private HashSet<String> selectFriends = new HashSet<>();
+    private HashSet<String> favoriteFriends = new HashSet<>();
 
     //Account関連のGetter
     public String getName() {
@@ -100,6 +99,13 @@
     public HashSet<String> getSelectFriends() {
         return selectFriends;
     }
+    public HashSet<String> getFavoriteFriends() {
+        if(favoriteFriends.isEmpty()){
+            SharedPreferences preferences = getSharedPreferences("prefData", MODE_PRIVATE);
+            favoriteFriends = (HashSet<String>) preferences.getStringSet("favoriteFriends", new HashSet<>());
+        }
+        return new HashSet<>(favoriteFriends);
+    }
 
     //Setter
     public void setName(String name) {
@@ -161,6 +167,12 @@
     public void setSelectFriends(String selectFriend) {
         this.selectFriends.add(selectFriend);
     }
+    public void setFavoriteFriends(String favoriteFriend) {
+        SharedPreferences preferences = getSharedPreferences("prefData", MODE_PRIVATE);
+        SharedPreferences.Editor editor = preferences.edit();
+        editor.putStringSet("favoriteFriends", favoriteFriends);
+        this.favoriteFriends.add(favoriteFriend);
+    }
 
     //フィルターを取り除く
     public void removeSelectGenres(String selectGenre){
@@ -169,4 +181,7 @@
     public void removeSelectFriends(String selectFriend) {
         this.selectFriends.remove(selectFriend);
     }
+    public void removeFavoriteFriends(String favoriteFriend){
+        this.selectFriends.remove(favoriteFriend);
+    }
 }