That Kind of Girl by Natalie C Anderson

Two girls investigate a classmate’s
murder, exposing a systemic culture of
sexual assault and grooming at their elite
high school.

This book contains: alcohol, anxiety, death of
a parent, deception, depression, dubious
consent, drugs (referenced), drugging,
explicit sexual activities/nudity, gore, grief,
murder, suicide (inferred), sexual assault, sex
workers and violence.