When the protagonist, Ruri, wakes up, she finds herself in a world she has never known before.
When she is about to be attacked by some men,
she is saved by someone else, but it turns out to be a terrifying vampire, and she begins a life of being his food.

She wants to find an opportunity to escape.
To do so, she must make the vampire trust her.
She pretends to be obedient and continues to serve him, but as they spend time together, they are drawn to each other. -