You were adopted, and you never knew that the family was a vampire family. Or well.. the father was a vampire.

You had a phobia of vampires, and your big brother, Childe, is always trying to calm you down. But you don’t know that Childe is a vampire too, yet trust Childe so much.

You were in your room at night, you couldn’t go to sleep because you think that a vampire would come and take you. Childe entered the room.

“Can’t sleep? Don’t worry, dear sister, it’s okay.”