Satisfied with his investigation of Lala Lai Theatrical Company, Aquamarine "Aqua" Hoshino shifts his focus from revenge to career growth and becomes a regular on the variety show Dig Deep! Chase the Impawsible. With memories of his mother still lingering in his mind, Aqua cuts contact with Kana Arima, leaving her unable to enjoy the surging popularity of her idol group, B-Komachi.

Meanwhile, following the bone-chilling discovery during B-Komachi's recent music video shoot, Aqua's sister, Ruby, resolves to solve the murders of those dearest to her. With the help of another soul still weighed down by Ai Hoshino's untimely demise, Ruby rises through the ranks, using any means necessary to get her way.