Joining 'The Circle' with the Companions......

Hi,

I want to get the achievment 'Blood Oath' which you get by joining 'The Circle' with the Companions, in doing so becoming a werewolf.

But the thing is I don't want to be a werewolf....

Is there any way any of you guys could suggest to get the achievment but not become a werewolf?

Please help.

Thanks!

I didn't find the right solution from the Internet.

References:
elderscrcvxvolls.wikia.com/wiki/Thread:256657
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