Otameshi de Yobareta Seijo nano ni Saikyou Ryuu ni Ki ni Irarete Shimaimashita. (Light Novel)

I'm Miko, a young woman who was summoned to another world as an experiment. Having been granted the ability to communicate with magical beasts, I was given the duty of expelling the ultimate human-hating dragon (which is the final boss) from the forest... Wait, that's completely absurd! But in order to get the cold-hearted dragon to open up to me, I try to get along with the beast by being friendly and talking with him -- only to have him say "your voice really soothes me for some reason, Miko" and have him become more and more overprotective of me...?!