It's Just Not My Night! - Tale of a Fallen Vampire Queen Vol. 2 (manga)

Once, Manamir was the Queen of the Night, a legendary vampiress–but now she’s stuck on Earth, working as a convenience store clerk. She’s been doing her best to get her powers back, but despite her boundless confidence, things just never seem to go Manamir’s way. Even worse, somehow she’s wound up neck-deep in debt to the mob! When one of her loyal minions appears on Earth, is it the lucky break she’s been waiting for, or a whole new kind of otherworldly trouble?