Coco of the Dark

When the protagonist wakes up, he is in a dark house with a girl who looks like a doll. The girl calls the protagonist Papa and is attached to him, but the protagonist has no memory of her. The protagonist has never been with anyone before, and the protagonist knows that the girl is not his child. The room he is in is larger than the apartment the protagonist is renting. He admits that it is not his house. Yesterday, as always, he drank outside and then had no memory. Perhaps he got drunk and made a mistake and ended up in this house. The protagonist concludes that the girl calls him Papa because she coincidentally resembled him.

Inside a very dark house where there is no electricity. The curtains are closed, as if they don't want to show the outside of the window.