Wagamama Chie-chan

Before starting at her mother's former school, Seiran Middle, Saho Hanawa encounters a ghost girl wearing the school uniform in the rain. The girl, Chie, asks to go to Saho's home, and they spend time talking and debating. Saho's parents initially think she is on her phone, but are surprised when they see her speaking to empty space. Saho eventually admits she can see a ghost named Chie, which surprises her parents. They then explain that Chie was the name of the stillborn baby they had before Saho—making her Saho's deceased older sister.