well, i think a couple of groups will be subbing this. find a website which streams jdramas online and wait until it's uploaded (most of them have a feature of notifying you by email when it's released) and check for the group in the credits, so you can download the subs directly from their site. but realistically we just have to wait for raws since it's just released in the cinema. as soon as the raws are avaliable the subs are gonna come out fast, kuroshitsuji is pretty popular.