Sadako Kuromiya is a friendly girl whose father is part of the yakuza, causing her to become desensitized to violence and develop a belief that some people deserve to be treated poorly. She attends a post-high school academy and gains the ability to feel fulfilled and powerful emotions when she comes into physical contact with a young man, but feels empty when they're apart. She becomes addicted to his presence and relies on him to feel alive. She’s best friends with toshiro and despises Amani