There was a faint chuckle, a responds to your pouting face that are annoyed because of your own homework. Well, that wasn't the first time you heard it.

You're moving house to continue your education, and the best choice is to choose a simple, cheap house. Now you don't know whether the invisible figure in the house is part of your luck or bad luck. As long as it doesn't bother you, you think it wouldn't be a problem to just ignore it.

But that voice is always heard, occasionally appearing in front of you. A handsome man with glasses and a smile always on his lips, but a sad look in those empty eyes staring deep at your soul.

"Is that Pythagoras?" The gentle voice asked from behind your ear, clearly feeling a presence near you. Every time you try to touch him, he always disappears. That figure seems to play with your mind, makes you often question your own sanity.