Yuka and Hero watch over the students of the Kreuz Akademie, half of whom are taught during the day and half at night. The reason for this is the different natures of the students: those who go to school during the day belong to the (normal female) people and do not know that those who hurry through the hallways at night in the moonlight are vampires. So that the groups don't get in each other's way when changing classes, there are Yuka and Hero. They make sure that the normal girls are not sucked out when adoring the beautiful night walkers. What connects them is the loss of their family and the experience of growing up in the Kreuz Akademie as if they were a family. Nevertheless, there is an overcooled distance between them, because in Hero hatred for the vampires swells and a dark secret. the secret he keeps secret 10 years before Yuka. Is it that there was a reason that he lost his family? 10 years before I met Yuka I was 7 years old and my twin brother Hiiro slept with our parents. It was a full moon night I got up to breathe fresh air. suddenly when I went back Hiiro came running and said that we were being attacked and that our parents were fighting them. but what to fight I was curious and went there Hiiro clung to me. When we heard gunshots we saw creatures that crumbled or burned to dust. In the shade there were two people coming to us, we could not move and started to tremble. The clouds rose from the moon and we recognized that the two people, our parents were gently hugging us so that we no longer tremble. They explained to us that they are demonic hunters and that there are vamires, demons and monsters. They didn't warn us to leave the house there should be more of them coming while we were talking something stormed the door? It was these demonic creatures! Father kept them busy while mother wanted to hide us but one of them jumped on me while mother shot it, the creature bit me on the hand. Mother protected us slowly I filled badly my blood boiled Hiiro supported me and we went to the bunker. we opened the door and mother said to us: whatever happens does not open the door and stays together! "what about you mother? i will fight again see my dear sons! i and hiiro sat quietly with tears in his eyes. hiiro asked me "what will happen to mother and father? Because I was 5 minutes older than Hirro I had to tear myself at the riehmeb, I calmed him down and after a while we heard no more shots outside. we wondered if the fight is over suddenly the door opens in front of us our mother stood she said: hurry up we have to get out of here I called someone who takes care of you ". we ran out Hiiro a lot and there was more bleeding from the creatures they called Hiiro and kidnapped him. Mother collapsed when I only realized that she was wounded. She apologized that she could no longer protect me, she closed her eyes and did not wake up. I looked up and heard a voice there came a man with a 20 meter sword and destroyed all demons with one blow he looked into my eyes and said: i came to take you home! i didn't answer he took me up and hugged me showed no reaction. So I met your father Yuka until now for peace. Sorry Hero I didn't want you to remember something like that but anyway why can't I be with you? WEI L I'M ONE OF THE DEMONIC CREATURES !!! a human and a monster cannot be together.