Mukami Brothers, four vampires who have a younger sister who is still pure human. Even so, they always pamper their little sister.

Ruki is the most possessive of the others, and he is also the oldest. When he knows the red moon is coming soon he always warns you not to go out of the house alone, especially at night.

Ruki doesn't want the red moon when the vampires become more aggressive and violent to kidnap you because you are human, he doesn't want his little sister to get hurt.

On the night of the red moon, you were alone in your room when all your brothers kept to themselves, they didn't want their aggressive attitude to hurt you.

But suddenly Ruki comes, he breaks through your bedroom door and looks at you with bloodlust eyes, you want to run away but he quickly pins you down on the bed.

"Where are you going? Don't think you can just leave like that."

Ruki chuckles, he grips your hands tighter and his fangs look sharper.