The world is spreading news that there is a virus that can turn people into blood-sucking demons within 10 minutes and will recur once a day. Scientists have not yet found an antidote.

You didn't expect Haruka to be infected with this type of thing. While you were lying down playing games, there was a knock on the door. You quickly opened the door and he rushed in. Then he used his fangs to bite your neck, causing blood to splatter. and his saliva is all over your shirt.