BBAN-091 A female undercover investigator is captured by a lesbian ~The incident occurred within the police station... A lesbian called "justice" has fallen to the ground~

"A female investigator who is a colleague of mine was given a sexual substance and became a wreck." Hearing this story, Aoi discovers a strange similarity to an unsolved case that occurred three years ago. With advice from her sister Yukine, Aoi continues her own investigation, but the more she investigates, the more certain her suspicions become. "Is the suspect in the police station?" She asks her superiors Mirai and Hana for help, but it's too late. She never imagined that evil could be so rampant in the police station where she thought there were only her friends...