After school, Matsumoto Ichika is tightly bound in the liberated area. (JBD-291)

"Are you hiding something from me?" Something's been off lately. Nagisa and Hikaru, who usually play with me after school, haven't been playing with me anymore. One day after school, after being rejected, Ichika decides to follow them, but loses sight of them as she approaches the office. She sneaks into the office and finds red candles and a bundle of hemp rope inside...