A man just moved into an apartment and heads to the receptionist to get his keys. The receptionist gave him the key with a smile but warns him not to disturb the door with no number on his floor. He wondered why but didn't bother to ask, he was too busy with his new apartment to care. After he finished unpacking he began to get curious. He questioned why the receptionist would warn him of such things, and so he stepped out of his apartment to check the door with no number.
He tried the door knob first but it was locked, so instead he got onto his knees and peeked through the keyhole. The apartment he was looking into was empty. His eyes scanned the whole place before stopping at a woman, standing face against a wall, in the corner. He noticed her pale skin and long black hair before stepping back, suddenly feeling perverted in a way for invading someone else's privacy. He brushed it off, assuming she was someone that did not want to be disturbed.
The next day he got more curious about the woman and eventually went back, straight away getting onto his knees. He peeked through the keyhole and saw all red. Red. He assumed that the pale woman must have caught him peeking the last time and covered the hole with something red.
He left the door alone and instead went down to the receptionist to ask her questions. The receptionist sighed and asked, "you looked through the keyhole, didn't you?"
He admitted to it and so she felt obliged to tell him the story. She told him that a couple used to live in that apartment a long time ago, but the husband went crazy and killed his wife. However, this couple wasn't normal.
They had pale skin, black hair and red eyes.