In the vampire kingdom
"Lady Estelle the lord has summoned you" said the central knight. So Estelle set off to meet the lord.
At the palace,
"My lord you summoned me" said Estelle.
"Yes, Lady Estelle" came the reply. "I wish to send you to the human world for a very important task." said the lord.
"This is a child named William Steven. He is been summoning the almighty god for a while. So the god decided to listen to his wish. His wish is finding about his parents who disappeared to the afterlife world while trying to send a demon back to the underworld. The god promised to send two people to accompany him to the afterlife world. One of them will be you and the other one is demon muzaka. I wish you two all the best. Hope you succeed and hold onto the trust that God has put on us."
So Estelle and Muzaka set out to the human world to find the child and sign the contract with him.