Help

I read this shounen ai manhwa/manhua (can't remember) where one one of the guy's a half vampire. The mom is a human who goes out of her way to make herself look young. If I remember correctly she also teaches at the school the two boys study in. The father is the vampire. He once invited the human boy to his house and made blood pudding so that they can all enjoy a meal together. I can't remember the name of the story. Does anyone know the title? Please help