Black Butler is a moving and dark anime. If you want to watch Black Butler online then here are a few options (we checked these as recently as February 2019):
- Amazon Video (100% free for USA, UK & Canada) – The entire series (1-3) is available on Amazon Video, and you can sign up for Amazon Prime Video completely free in 10 seconds and have access to Black Butler on there immediately (Amazon Prime users get Amazon Video access too).
Just cancel before the 30 days is up and you don’t pay anything, simple. If you’re wanting to watch series like Black Butler for free and in high quality right now, then a free trial with Amazon Video is your best option.
Or you can simply buy the episodes individually if you prefer.