(W) nigozyu (A) Umibozu, mugiko 'Due to my penchant for getting dragged into things, I, Kimihiko Kimizuka, an ordinary high-school student, suddenly was asked to protect national idol Yui Saikawa's Three-billion-yen sapphire!? When there's a detective, there's always a case, and so, another case begins for me and Siesta's heart's recipient, Nagisa Natsunagi!'

(W) nigozyu (A) Umibozu Kimihiko Kimizuka has survived the battle with Seed, but not without heavy casualties. Natsunagi is dead, Charlie is in critical condition, and Yui has been taken captive. Kimihiko is lost in despair, but Siesta appears before him to pull him back into action. He can't give up yet. After all, this story needs a happy ending, and what's an assistant without a detective?

(W) nigozyu (A) Umibozu While on an outing one day, a woman who looks exactly like Kimitsuka Kimihiko's dead mentor, Siesta, kidnaps the former detective's assistant and his three friends! There, she reveals a long-forgotten truth about Siesta's death. Will this be the clue that finally unlocks the secrets of his past?

(W) nigozyu (A) Umibozu After being kidnapped, Kimizuka, Natsunagi, Saikawa, and Charlie have learned the truth about Siesta???s death...or have they? A girl who looks just like the deceased detective appears and informs them that the footage they???ve been investigating contains an error. As they hunt for an answer to a mystery that even Siesta couldn???t uncover, the group will learn what it truly means to inherit the legacy of an ace detective. The detective is already dead, and the truth of her death has been already been revealed, but it???s still too early for the epilogue.

(W) nigozyu (A) Umibozu Once the assistant to a great detective, Kimihiko Kimizuka took on a challenge Siesta bequeathed to him after her death and arrived at a conclusion that surpassed his wildest expectations. To bring back the great detective-the stuff of miracles-Kimihiko and Natsunagi fly to London yet again to obtain evidence that can bring down Seed. On the flight there, however, he hears the same words as he did four years ago: 'Is there a detective on the plane?'

(W) nigozyu (A) Umibozu Siesta and Kimihiko's first meeting did not take place during that fateful plane jacking, but rather four years earlier. During that time, the federal government tasked Siesta with locating a spy in Japan, where she happened upon her future assistant. The secret of why the great detective took Kimihiko under her wing is finally revealed in this prequel!