The basic storyline is about a boy who is sentenced to be a sacrifice to a mysterious entity’s family. After living in the mansion for a while, he discovers that the entity has three distinct personalities.
The first is mature and wears glasses.
The second is frank and sassy.
The third is childish and playful.
At one point, the second personality warns the boy to be careful around the one who wears glasses—because that is the real entity.