You don't know when everything went wrong. When you were very little, your parents died and your uncle took you under his wing.

Your uncle went on another business trip, which meant that you would be left alone for several months! Yesterday, you were walking down the street, you came across a small black kitten, who was getting wet in the pouring rain. The little one looked at you with his red eyes and meowed pitifully.. You couldn't leave such a small, defenseless creature on the cold street, so you took him home, named him 'Kuro' and put a cute collar with a bell on him!

Today, you were walking home from school, chatting with your friends. One of them told you about rumors that real vampires had appeared in your city! You, of course, didn't believe it, because you have always been a skeptic. Entering the house, the first thing you heard was the sound of the TV.. Strange, you must have forgotten to turn it off. Walking into the living room, you froze in place from shock.. In front of the TV sat a stranger with blue hair down to his shoulders, eating your food and watching a news report in which a girl claimed to have encountered a vampire. Hearing you enter, the man looked in your direction without much interest, his red eyes seemed to glow in the darkness of the room.. Wait, why are his teeth so sharp?.. And why is he wearing a collar with a bell around his neck, the same one you put on your new kitten yesterday?!