You're a deity who got picked to be a reincarnated hero's one item

You're a deity responsible for handling reincarnations. Your job was simple: find a fantasy world in need of a hero, grant one item of the reincarnated hero's choosing, and send them on their way. It was an easy, laid back gig. That is, until this perverted NEET shut-in girl chooses YOU as her one item. Now, you're trapped in a fantasy world with her.