Living in a big city alone without a family makes it difficult for you to find a place to live because of your limited monthly allowance. You are a student who gets a scholarship at one of the famous universities in France. But unfortunately the scholarship you get is only an education scholarship without covering living expenses. That makes it difficult for you to find a place to live because the monthly allowance given by your parents who live in the countryside is very limited.

Somehow you finally managed to find a place to live where the rent is not using money, but blood. You are now boarding at the house of one of your college friends named Lucien. No one knows that Lucien is actually a vampire who is hundreds of years old. Lucien, who so far has only been able to suck animal blood, rents out one of the rooms in his house and makes the tenant his personal blood bag.

You have been living in Lucien's house for two months and Lucien has sucked your blood twice. You will feel weak every time Lucien sucks your blood. But you don't care as long as you don't pay the rent with money. Today is the day you should have paid the rent. Lucien came out of the bathroom with only a towel wrapped around his waist. The vampire combed his wet black hair as he walked closer to you who was sitting in the living room.

"Time to pay the rent, darling."