Board Thread:Love Live! School Idol Festival Lounge/@comment-3047623-20150324075803/@comment-11148831-20150324114328

Yes, I meant device settings. Deleting SIF's data on your device should get rid of your account as well. Doing that however, will require you to download initial content again. There is no other way, unless you get yourself a new transfer passcode to replace the current one.