diff --git a/proc_macros/proc_macros.rs b/proc_macros/proc_macros.rs
index 6cecba4..52c06f0 100644
--- a/proc_macros/proc_macros.rs
+++ b/proc_macros/proc_macros.rs
@@ -136,7 +136,7 @@ pub fn fanbox_api_test(item: TokenStream) -> TokenStream {
         async fn #name() {
             match std::env::var("FANBOX_COOKIES_FILE") {
                 Ok(path) => {
-                    let client = FanboxClient::new();
+                    let client = crate::fanbox_api::FanboxClient::new();
                     if !client.init(Some(path)) {
                         panic!("Failed to initiailze the client.");
                     }
@@ -184,7 +184,7 @@ pub fn fanbox_api_quick_test(item: TokenStream) -> TokenStream {
         async fn #name() {
             match std::env::var("FANBOX_COOKIES_FILE") {
                 Ok(path) => {
-                    let client = FanboxClient::new();
+                    let client = crate::fanbox_api::FanboxClient::new();
                     if !client.init(Some(path)) {
                         panic!("Failed to initiailze the client.");
                     }
diff --git a/src/fanbox/paginated_creator_posts.rs b/src/fanbox/paginated_creator_posts.rs
index d6b71eb..5a0e60f 100644
--- a/src/fanbox/paginated_creator_posts.rs
+++ b/src/fanbox/paginated_creator_posts.rs
@@ -1,7 +1,5 @@
 use super::error::FanboxAPIError;
 use super::item_list::FanboxItemList;
-#[cfg(test)]
-use crate::fanbox_api::FanboxClient;
 use crate::fanbox_api::FanboxClientInternal;
 use crate::gettext;
 use json::JsonValue;
diff --git a/src/fanbox/post.rs b/src/fanbox/post.rs
index 7908aa5..fd661c1 100644
--- a/src/fanbox/post.rs
+++ b/src/fanbox/post.rs
@@ -1,6 +1,7 @@
 use crate::fanbox_api::FanboxClientInternal;
 use crate::parser::json::parse_u64;
 use json::JsonValue;
+use proc_macros::fanbox_api_test;
 use std::fmt::Debug;
 use std::sync::Arc;
 
@@ -87,6 +88,16 @@ impl FanboxPostArticle {
         }
     }
 
+    #[inline]
+    pub fn prev_post(&self) -> Option<FanboxPostRef> {
+        let obj = &self.data["prevPost"];
+        if obj.is_object() {
+            Some(FanboxPostRef::new(obj, Arc::clone(&self.client)))
+        } else {
+            None
+        }
+    }
+
     #[inline]
     pub fn published_datetime(&self) -> Option<&str> {
         self.data["publishedDatetime"].as_str()
@@ -133,6 +144,7 @@ impl Debug for FanboxPostArticle {
             .field("is_restricted", &self.is_restricted())
             .field("like_count", &self.like_count())
             .field("next_post", &self.next_post())
+            .field("prev_post", &self.prev_post())
             .field("published_datetime", &self.published_datetime())
             .field("title", &self.title())
             .field("updated_datetime", &self.updated_datetime())
@@ -152,6 +164,16 @@ pub struct FanboxPostRef {
 }
 
 impl FanboxPostRef {
+    pub async fn get_post(&self) -> Option<FanboxPost> {
+        match self.id() {
+            Some(id) => match self.client.get_post_info(id).await {
+                Some(s) => Some(FanboxPost::new(&s["body"], Arc::clone(&self.client))),
+                None => None,
+            },
+            None => None,
+        }
+    }
+
     #[inline]
     pub fn id(&self) -> Option<u64> {
         parse_u64(&self.data["id"])
@@ -209,3 +231,33 @@ impl FanboxPost {
         }
     }
 }
+
+fanbox_api_test!(test_get_post_info, {
+    match client.get_post_info(4070200).await {
+        Some(data) => match data {
+            FanboxPost::Article(data) => {
+                println!("{:?}", data);
+                match data.next_post() {
+                    Some(r) => {
+                        println!("{:?}", r);
+                        match r.get_post().await {
+                            Some(r) => {
+                                println!("{:?}", r);
+                            }
+                            None => {
+                                panic!("Failed to get next post.")
+                            }
+                        }
+                    }
+                    None => {}
+                }
+            }
+            FanboxPost::Unknown(data) => {
+                println!("{}", data);
+            }
+        },
+        None => {
+            panic!("Failed to get the post info(第253話 【壁紙プレゼント】ひんやりレモンころねちゃん🍋).");
+        }
+    }
+});
diff --git a/src/fanbox_api.rs b/src/fanbox_api.rs
index c36a2fd..8e50987 100644
--- a/src/fanbox_api.rs
+++ b/src/fanbox_api.rs
@@ -384,11 +384,6 @@ impl Deref for FanboxClient {
     }
 }
 
-fanbox_api_quick_test!(
-    test_get_post_info,
-    client.get_post_info(4070200),
-    "Failed to get the post info(第253話 【壁紙プレゼント】ひんやりレモンころねちゃん🍋)."
-);
 fanbox_api_quick_test!(
     test_list_home_post,
     client.list_home_post(10),