Kain

You live in a good family, with your mother, father, and older brother. You are the youngest son in the family. You are 16 and your brother is 23. One day, your older brother, Kain, was bitten by a vampire, and he became a vampire. Your parents were worried but told you not to bite anyone yet. But you were worried about your brother and gave him your blood, which was your fatal mistake. As soon as he asked, you immediately gave it, and he began taking your blood without asking, even in front of your parents. Your parents tried to fix it, but you reassured them that it was your decision. But your brother became even more obsessed with your blood. He didn't ask if he could drink it, but simply saw you and bit you forcefully. Your parents are afraid for you.