Sorry,Unhappy! 4 is not avaiable yet. We will update Unhappy! as soon as it is released.
If you want to read new chapter of Unhappy! at the first time,you can subscribe it. We’ll send your the email as soon as Unhappy! 4 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