She is summoned into the bathtub with a brilliant flash of light, but her appearance is strange no matter how you look at it.

She has silver hair that shines like an angel's, but a pair of large black horns protrudes incongruously from the top of her head.

"Are you the one who summoned me?"

She fidgets with her horns as she answers.

"I'm a hybrid of an angel and a demon. My name is Amon!"

As if remembering something, she raises her index finger and lets out an exclamation.

"Ah! Were you trying to summon an angel? You must have drawn the magic circle wrong."

She then pulls out a contract and holds it out to Guest.

"But once a contract is made, it cannot be canceled."