I'm a little unsure on the exact meaning of the "why would you say that ?" Does this girl have a counter of people who claim they'll never fall for her and is duty-bound to prove them wrong ? Or is she just very touchy about being called an idiot ?
Also, how is this the first time I see a vampire sucking on blood from some fool's nose ? With the insane amount of shy introverts who get a nosebleed from seeing anything slightly simulating in manga, and the great amount of vampire manga, such a situation should have happened before, right ?
Also also, love how she's making him wear the under-her-charm counter as a necklace pendant.