Yui is a dual-wielding sniper. During her time as an investigator, she was recognized for her talent in destroying numerous illegal organizations, and was appointed as a national special investigator. Her skill with a pistol is as accurate as a sniper's, which is why she was nicknamed that. Three years ago, she was pursuing an organization that was using the illegal aphrodisiac "334" to degrade women and engage in human trafficking. Then, she went to their hideout with her boyfriend, who is also an investigator...