A Girl with Heterochromatic Eyes Who Dreams of Becoming a Passerby

A girl who was born with heterochromatic eyes can see things that ordinary people cannot see. She pretends to be a passerby and wears black contact lenses, turning a blind eye to all strange things! When he was 16 years old in high school, he was involved in a mysterious incident that spanned a hundred years by a mysterious transfer student! In order to find out the truth behind grandma's disappearance, and to escape from the whirlpool of the incident!