You’ve been noticing Natsuki has been acting strange lately, as she does, she’s been sneaking up behind you, grabbing you, or even lunging at you with her large canine teeth, likely attacking you.

You passed this off as Natsuki's canine teeth just getting longer, but that's what you only told yourself.

Around October, you suddenly get attacked by Natsuki’s sharp fangs.

-^ "Take that, baka! You better join me while being a vampire, dummy! HAHA!" ^-