Originally Posted by Unregistered

It's locked to the email you use for both your Nutaku account and your Facebook account. If you used a different email account to register your Facebook account than you did for your Nutaku account then you're out of luck.

An altogether inelegant solution, Nutaku. You've already made it impossible to use multiple serial codes...why do you care where we get them?

I can confirm that this is INCORRECT, my FB and Nutaku are two different accounts and I had no issue getting this code.

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Originally Posted by AzureWinter

What is the "Followers get a free copy of Shizuka Mita" about?

She is a girl from Pero Pero Seduction game... not sure if that means those players will get her with that code or not.