TsukiFukuyushima
A girl named Neptune has the hobby of exploring haunted house.
She always loved the paranormal and se really wanted to meet a ghost.
When she went to Japan she heard of many ghost stories, and she wanted to see if they were true so, as her first adventure, she went to a house.
This house was once lived by a family of 4 people: the mom, the dad and two female twins.
One day, one of the two daughters vanished from the world like she never existed, and everyone except the other daughter remembered of her.
When the second daughter got back, she wasn't her real self, and her family ran away, leaving the house with her inside, but she had already killed the other daughter.
Neptune, pretending to don't be scared, asked her best friend Ichika to go with her and she said yes without even being worried.