diff --git a/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java b/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
index 637c161..438bb14 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
@@ -1,7 +1,42 @@
 package org.ntlab.citrusserver.repositories;
 
+import org.ntlab.citrusserver.entities.Book;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Repository;
 
+import java.util.HashMap;
+import java.util.HashSet;
+
 @Repository
 public class FavoriteManager {
+    private final AccountManager accountManager;
+
+    @Autowired
+    public FavoriteManager(AccountManager accountManager) {
+        this.accountManager = accountManager;
+    }
+
+    private final HashMap<String, //accountid
+            HashMap<Integer, //bookid
+                    HashSet<String>>> //otheraccounts
+            favoritedMap = new HashMap<>();
+
+
+    //book_idをいいねしたaccount_idをリストとして返す
+    public HashSet<String> getFavorited(String accountId, int bookId) {
+        if(accountManager.getAccount(accountId) == null) return null; //アカウントが存在しない
+
+        return favoritedMap.get(accountId).get(bookId);
+    }
+
+    //other_account_idの人がaccount_idのbook_idにいいねをした時
+    public void putFavorited(String accountId, int bookId, String otherAccountId) {
+        favoritedMap.get(accountId).get(bookId).add(otherAccountId);
+    }
+
+    //イイねしたaccount_idをイイねした人リストから削除
+    public void removeFavorited(String accountId, int bookId, String otherAccountId) {
+        favoritedMap.get(accountId).get(bookId).remove(otherAccountId);
+    }
+
 }