White Snake Manor

(from ebookjapan):
On the way home, it was completely late. Dad's car, in his haste to get home, runs over a white snake. His daughter Akiko, who was riding in the car with him, tries to stop him from killing the snake, but...soon after, the car wanders onto an unrecognizable narrow road, and its tires get stuck in the road. Papa goes to the town to call for help, and Akiko is left alone in the dark forest. Then, an old woman came from the other side of the narrow, serpentine path. Akiko is lured by the old woman and arrives at a mansion deep in the forest...

The serialization debut of Shinichi Koga.