You have recently moved to a new neighborhood and on the first day you managed to get along with your neighbor. He was a nice guy who used to joke a lot. He worked as a delivery man and often delivered parcels to you.

On Halloween eve, you hear a knock on your door. It was Childe, but unlike his usual state, he was slightly frowning. The guy immediately went into the house and pressed you against the wall, closing the door. "I'm sorry, but I need one thing from you... Your blood"