diff --git a/metadata/ar.rulosoft.mimanganu.yml b/metadata/ar.rulosoft.mimanganu.yml
index a6699dd736..d0ebe5b7a6 100644
--- a/metadata/ar.rulosoft.mimanganu.yml
+++ b/metadata/ar.rulosoft.mimanganu.yml
@@ -1,3 +1,6 @@
+AntiFeatures:
+  - NonFreeNet
+  - NSFW
 Categories:
   - Reading
 License: MIT
diff --git a/metadata/com.ero.kinoko.yml b/metadata/com.ero.kinoko.yml
index c8365d1558..9bb9b32f71 100644
--- a/metadata/com.ero.kinoko.yml
+++ b/metadata/com.ero.kinoko.yml
@@ -1,5 +1,6 @@
 AntiFeatures:
   - NonFreeNet
+  - NSFW
 Categories:
   - Graphics
   - Reading
@@ -313,6 +314,9 @@ Builds:
       - $$flutter$$/bin/flutter build apk
     ndk: r23
 
+MaintainerNotes: While the default sources seem clean, the screenshots strongly imply
+    adult content so I tagged this NSFW to be on the safe side.
+
 AutoUpdateMode: Version v%v
 UpdateCheckMode: Tags v\d+\.\d+(\.\d+)?
 UpdateCheckData: pubspec.yaml|version:\s.+\+(\d+)|.|version:\s(.+)\+
diff --git a/metadata/eu.kanade.tachiyomi.yml b/metadata/eu.kanade.tachiyomi.yml
index 0302475104..b726387dd6 100644
--- a/metadata/eu.kanade.tachiyomi.yml
+++ b/metadata/eu.kanade.tachiyomi.yml
@@ -504,6 +504,10 @@ Builds:
       - sed -i -e '/google-services/d' ../build.gradle.kts build.gradle.kts
     ndk: r22b
 
+MaintainerNotes: Offers both SFW and NSFW addons, but clearly marks NSFW addons as
+    18+. So we don't need to mark it NSFW because the app already does that for such
+    content itself.
+
 AutoUpdateMode: Version v%v
 UpdateCheckMode: Tags
 CurrentVersion: 0.13.1
diff --git a/metadata/moe.feng.nhentai.yml b/metadata/moe.feng.nhentai.yml
index d6dbc43299..4933f3885d 100644
--- a/metadata/moe.feng.nhentai.yml
+++ b/metadata/moe.feng.nhentai.yml
@@ -1,5 +1,6 @@
 AntiFeatures:
   - NonFreeNet
+  - NSFW
 Categories:
   - Multimedia
   - Internet
diff --git a/metadata/org.nonononoki.hendroid.yml b/metadata/org.nonononoki.hendroid.yml
index 9ba467f7d9..831188a4db 100644
--- a/metadata/org.nonononoki.hendroid.yml
+++ b/metadata/org.nonononoki.hendroid.yml
@@ -1,6 +1,7 @@
 AntiFeatures:
   - Ads
   - NonFreeNet
+  - NSFW
 Categories:
   - Reading
 License: Apache-2.0
diff --git a/metadata/org.nv95.openmanga.yml b/metadata/org.nv95.openmanga.yml
index 3b2d84b356..bdac056887 100644
--- a/metadata/org.nv95.openmanga.yml
+++ b/metadata/org.nv95.openmanga.yml
@@ -1,3 +1,6 @@
+AntiFeatures:
+  - NonFreeNet
+  - NSFW
 Categories:
   - Reading
   - Multimedia