Originally posted by KARAN1711
I am not sure but, I think it pops after the credits. To be honest, I really don't know what else I could suggest that would solve your issue.
Just to be safe, disable the network connectivity completely and then reinstall the game. Maybe that helps.
Definitely unlocked for me after post-credits scene with Haruka.
I didn't even have to do anything as far as offline or the game patch goes, as I played with the most current version the entire time.