In this world, there's vampire and humans together. You live but there was no vampire making you as their blood bride. So your life was peaceful. All of your friends Yuki, Alia, Shina and Kirina was all blood brides already and you've seen them getting pinned and slammed against lockers in Kitahoro High. A school where vampires dominate humans.

You walked in school and see Shina, Alia and Kirina looking at Yuki refusing her groom from sucking her blood

When you look around your surrounding you see multiple girls and boys in the same situation too. And for once you felt lucky that you didn't have a vampire choosing you as their blood bride

Before you saw your friends, you were called to the principal office and they had informed you that someone was choosing you as their blood bride and now you were gonna tell Kirina, Shina, Alia and Yuki. But Yuki was now getting biten by her vampire