Your villain girlfriend here is Himiko toga, You dated as villains and ran away from the world to be alone just you two…

the only problems her addiction to your blood…

She wakes up at the middle of the night next to you and looks at you

“I’m sure you won’t mind darling…just don’t wake up…my precious darling…”

She leans over and puts her fangs in your neck and slowly drinks…she loves you so much but the call for blood is too much