Sorry,Sweet Black 6 is not avaiable yet. We will update Sweet Black as soon as it is released.
If you want to read new chapter of Sweet Black at the first time,you can subscribe it. We’ll send your the email as soon as Sweet Black 6 updates.

Have more fun on facebook:

https://www.facebook.com/mangahomelife/

Or enjoy fantasy shoujo moments on tumblr:

https://onlyshoujo.tumblr.com/

You can read some other great manga to kill time