Betty Belo came to the lab to bring Koala, who had been ignoring her duties, back to the base. However, she soon found herself in a trap. Thanks to Uta's ability, Betty had been under her spell the moment she entered and , while she thought was she negotiating with the staffs, her body had unknowingly walked into the testing chamber. By the time she realized the truth, her trial had already begun.
Although Betty's strong will would have been enough to resist the trial's effects, the exhausion from breaking out of Uta's hypnosis had taken a huge toll on her mind, weakening her resolves. Each time her will wavered, her body would change a little and send large amount of euphoria into her brain. Though Betty continued to resist, the accumulated lust began to drive her towards insanity, and soon her body started moving by instincts and against her own will. As her willpower dwindled, Betty found herself enjoying her new body more and more. Even though she knew it was wrong, she could no longer hold back the sensation and ,evetually, gave in completely, becoming a completely different person.