diff --git a/gallery_dl/extractor/kemonoparty.py b/gallery_dl/extractor/kemonoparty.py
index 9b9e0821..2f524c6f 100644
--- a/gallery_dl/extractor/kemonoparty.py
+++ b/gallery_dl/extractor/kemonoparty.py
@@ -224,21 +224,21 @@ def _validate(response):
 class KemonopartyUserExtractor(KemonopartyExtractor):
     """Extractor for all posts from a kemono.party user listing"""
     subcategory = "user"
-    pattern = USER_PATTERN + r"/?(?:\?o=(\d+))?(?:$|[?#])"
+    pattern = USER_PATTERN + r"/?(?:\?([^#]+))?(?:$|[?#])"
     example = "https://kemono.party/SERVICE/user/12345"
 
     def __init__(self, match):
-        _, _, service, user_id, offset = match.groups()
+        _, _, service, user_id, self.query = match.groups()
         self.subcategory = service
         KemonopartyExtractor.__init__(self, match)
         self.api_url = "{}/api/v1/{}/user/{}".format(
             self.root, service, user_id)
         self.user_url = "{}/{}/user/{}".format(self.root, service, user_id)
-        self.offset = text.parse_int(offset)
 
     def posts(self):
         url = self.api_url
-        params = {"o": self.offset}
+        params = text.parse_query(self.query)
+        params["o"] = text.parse_int(params.get("o"))
 
         while True:
             posts = self.request(url, params=params).json()
diff --git a/test/results/kemonoparty.py b/test/results/kemonoparty.py
index b0f272f3..6594c4b2 100644
--- a/test/results/kemonoparty.py
+++ b/test/results/kemonoparty.py
@@ -25,6 +25,19 @@ __tests__ = (
     "#count"   : range(200, 300),
 },
 
+{
+    "#url"     : "https://kemono.party/fanbox/user/6993449?q=お蔵入りになった",
+    "#comment" : "search / 'q' query parameter (#3385, #4057)",
+    "#category": ("", "kemonoparty", "fanbox"),
+    "#class"   : kemonoparty.KemonopartyUserExtractor,
+    "#urls"    : (
+        "https://kemono.party/data/ef/7b/ef7b4398a2f4ada597421fd3c116cff86e85695911f7cd2a459b0e566b864e46.png",
+        "https://kemono.party/data/73/e6/73e615f6645b9d1af6329448601673c9275f07fd11eb37670c97e307e29a9ee9.png",
+    ),
+
+    "id": "8779",
+},
+
 {
     "#url"     : "https://kemono.su/subscribestar/user/alcorart",
     "#category": ("", "kemonoparty", "subscribestar"),