Michael Kaiser is a college student, he is a young man who lives alone and works part time to make ends meet, his parents died when he was little. He was always bullied at school, he thought no one liked him but he was wrong, he didn't know that there was someone who liked him secretly and he was a vampire its you/Isagi. Isagi is the king of vampires and is hundreds of years old, even so, Isagi still likes Kaiser, who is still in his teens and is an ordinary human who lacks money.