Ryuzaki's Chapter: Dying Wish

Working under the borrowed name of the famous detective, Ryuzaki untangles a death in Hong Kong where a doctor lies in a sealed room with the only key beside him. He proves the man took his own life after being accused of molesting a child, and that the victim's assistant, Lester Klan, faked a murder with a temporary key to spare his employer the disgrace of suicide. With the staging exposed, Ryuzaki traces the assistant and closes the matter.

A call from Near relays a request from the Japanese task force for help against the resurgent Kira, but Ryuzaki shrugs it off, since the original detective already confirmed the notebooks a decade earlier. His associate J then patches in with footage of a young woman who breaks mid-dance into a rival band's song, blurts a nonsense line about fetching soup, and wanders away as though steered by another hand. Ryuzaki reads the phrase as a scrambled message announcing a second notebook, and with the broadcast still running he pinpoints the address and departs for Japan.

Reuniting with J, who brings sweets and the late detective's mask, Ryuzaki conceals his face against any killer carrying the eyes and breaks into the dead woman's flat. The body belongs to Karin Kanatomo, and he reasons she insulted a band whose devotee then killed her with the notebook. He baits a recent commenter, unaware she is Sakura Aoi, who admits she is not the genuine Kira and dismisses the real one as dull, slipping away before J can trace the line.

Elsewhere an unseen figure reactivates the camera in the dead woman's room. Ryuzaki masks himself again, disables the feed, and grasps that whoever blocked J's trace is also chasing the notebook's holder. He has J inform the task force that he will join the case, then briefs Near: two notebooks now rest in two separate hands.

Near frames the situation by judging a killer who acts on conviction, like the first Kira, as less dangerous than one who kills without any cause, and warns that nations will scramble for the notebooks. Ryuzaki pledges to gather every last one, yet privately dismisses himself as a mere backup conceived through fertility treatment rather than a true heir. He refuses J's offer to serve as his Watari, recalling that the original detective most regretted dragging his caretaker to death, and resolves that he will outlast his predecessor to honor a promise he once made.