Sorry,Siren 40 is not avaiable yet. We will update Siren as soon as it is released.
If you want to read new chapter of Siren at the first time,you can subscribe it. We’ll send your the email as soon as Siren 40 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