The Detective Is Already Dead, Vol. 6 (manga)

"What could they want with Yui...?"Nagisa Natsunagi and I, Kimihiko Kimizuka, were finally able to uncover the mystery of the Ace Detective Siesta's death by drawing out Nagisa's other personality, Hel-and the truth along with her. But I barely had time to process everything before idol extraordinaire Yui Saikawa suddenly showed up at my door and offered me a job as her producer! Of course, it's not nearly that simple, with the paparazzi on her tail and an unholy alliance of Bat and Seed waiting in the wings...Seems like they also want her for some nefarious purpose?! In fact, it feels like everyone's after Yui...With enemies on all sides, what revelations will our prologue's finale have in store?