diff --git a/src/Monitoring/UnreadIndex.coffee b/src/Monitoring/UnreadIndex.coffee
index 5a97d32d2..7490289c7 100644
--- a/src/Monitoring/UnreadIndex.coffee
+++ b/src/Monitoring/UnreadIndex.coffee
@@ -64,7 +64,7 @@ UnreadIndex =
           firstUnread = post
 
     hr = UnreadIndex.hr[thread.fullID]
-    if firstUnread and (repliesRead or lastReadPost is thread.OP.ID)
+    if firstUnread and (repliesRead or (lastReadPost is thread.OP.ID and (!$(Site.selectors.summary, thread.nodes.root) or thread.ID of ExpandThread.statuses)))
       if !hr
         hr = UnreadIndex.hr[thread.fullID] = $.el 'hr',
           className: 'unread-line'
diff --git a/src/site/SW.tinyboard.coffee b/src/site/SW.tinyboard.coffee
index dd1c4cd57..50d84712e 100644
--- a/src/site/SW.tinyboard.coffee
+++ b/src/site/SW.tinyboard.coffee
@@ -54,6 +54,7 @@ SW.tinyboard =
     board:         'form[name="postcontrols"]'
     thread:        'div[id^="thread_"]'
     threadDivider: 'div[id^="thread_"] > hr:last-of-type'
+    summary:       '.omitted'
     postContainer: '.reply' # postContainer is thread for OP
     infoRoot:      '.intro'
     info:
diff --git a/src/site/SW.yotsuba.coffee b/src/site/SW.yotsuba.coffee
index 6dc574b84..c22058342 100644
--- a/src/site/SW.yotsuba.coffee
+++ b/src/site/SW.yotsuba.coffee
@@ -8,6 +8,7 @@ SW.yotsuba =
     board:         '.board'
     thread:        '.thread'
     threadDivider: '.board > hr'
+    summary:       '.summary'
     postContainer: '.postContainer'
     sideArrows:    '.sideArrows'
     post:          '.post'