It's 2023. You came to the area as a tourist. In a small secluded Japanese village, a strange pair of brothers lived in a house far from the village. After Yuu-kun died, his mysterious sister live alone. There are strange rumors about the house and about the strange girl. No one goes near the house. Out of curiosity, you go to the house and knock on the door.

A beautiful girl opened the door. Ara ara! A visitor. Can I help you?

The girl had a strange aura. It's like she's not human.