diff --git a/gallery_dl/extractor/poipiku.py b/gallery_dl/extractor/poipiku.py
index e09a7aae7b..e371ee26ed 100644
--- a/gallery_dl/extractor/poipiku.py
+++ b/gallery_dl/extractor/poipiku.py
@@ -52,20 +52,23 @@ def items(self):
             }
 
             yield Message.Directory, post
-            post["num"] = 0
+            post["num"] = warning = 0
 
             while True:
                 thumb = extr('class="IllustItemThumbImg" src="', '"')
                 if not thumb:
                     break
                 elif thumb.startswith(("//img.poipiku.com/img/", "/img/")):
+                    if "/warning" in thumb:
+                        warning = True
+                    self.log.debug("%s: %s", post["post_id"], thumb)
                     continue
                 post["num"] += 1
                 url = text.ensure_http_scheme(thumb[:-8]).replace(
                     "//img.", "//img-org.", 1)
                 yield Message.Url, url, text.nameext_from_url(url, post)
 
-            if not extr('ShowAppendFile', '<'):
+            if not warning and not extr('ShowAppendFile', '<'):
                 continue
 
             url = self.root + "/f/ShowAppendFileF.jsp"
@@ -87,7 +90,8 @@ def items(self):
 
             page = resp["html"]
             if (resp.get("result_num") or 0) < 0:
-                self.log.warning("'%s'", page.replace("<br/>", " "))
+                self.log.warning("%s: '%s'",
+                                 post["post_id"], page.replace("<br/>", " "))
 
             for thumb in text.extract_iter(
                     page, 'class="IllustItemThumbImg" src="', '"'):
diff --git a/test/results/poipiku.py b/test/results/poipiku.py
index dd9e744d48..8b7da5a88e 100644
--- a/test/results/poipiku.py
+++ b/test/results/poipiku.py
@@ -48,8 +48,8 @@
     "#count"   : 4,
 
     "count"        : 4,
+    "num"          : range(1, 4),
     "description"  : "絵茶の産物ネタバレあるやつ",
-    "num"          : int,
     "post_category": "SPOILER",
     "post_id"      : "6411749",
     "user_id"      : "2166245",
@@ -65,12 +65,28 @@
     "#count"   : 3,
 
     "count"        : 3,
+    "num"          : range(1, 3),
     "description"  : "ORANGE OASISボスネタバレ<br />曲も大好き<br />2枚目以降はほとんど見えなかった1枚目背景のヒエログリフ小ネタです𓀀",
-    "num"          : int,
     "post_category": "SPOILER",
     "post_id"      : "5776587",
     "user_id"      : "3572553",
     "user_name"    : "nagakun",
 },
 
+{
+    "#url"     : "https://poipiku.com/1400760/5483268.html",
+    "#comment" : "Warning and no 'Show all' button (#6736)",
+    "#category": ("", "poipiku", "post"),
+    "#class"   : poipiku.PoipikuPostExtractor,
+    "#urls"    : "https://img-org.poipiku.com/user_img02/001400760/005483268_JdB7sAWpv.jpeg",
+
+    "count"        : 1,
+    "num"          : 1,
+    "description"  : "えち描く描く詐欺ずっとやってるのですこしかいてた<br />ほたしか写ってないよ",
+    "post_category": "TRAINING",
+    "post_id"      : "5483268",
+    "user_id"      : "1400760",
+    "user_name"    : "onitsuraaaai",
+},
+
 )