Gaiden Chapter 5.2

Inside the Passenger Train / Morning / Cloudy ② (旅客列車内／午前／曇天　②,) is the second part of the 5th chapter of the Bungo Stray Dogs Gaiden manga.

Summary
Ayatsuji motions Kubo to alight from the train, while the detective stays behind as instructed by Kyōgoku. As Kubo asks Ayatsuji to send his regards to Kyōgoku before departing, Ayatsuji nonchalantly asks why he thinks he would possibly kill the Engineer. For one, Ayatsuji muses that his ability grants any criminal an accidental death as long as there is proof of their crime. Nevertheless, Ayatsuji himself states that he would kill Kubo, if he would choose to, because he is not even worthy of being punished. If Kyōgoku is proven to be his criminal instigator, he would "die accidentally", giving Kubo the chance by then to be free from being Kyōgoku's underling.

Enraged, Kubo bellows that he is not anyone's accomplice or minion, insisting instead that he is someone special. Ayatsuji further provokes him by echoing Kyōgoku's belief that the howling of a fool is pleasant to listen to, leading Kubo to threaten and kill Ayatsuji, especially once he has ensured his safety and escape. Ayatsuji merely accepts his taunt.

However, Ayatsuji once more asks Kubo whether he has been seeing hallucinations lately, ever since five years ago until the present, of a dog, a fox, or a monkey. Apparently twitching at the last option, Kubo blankly answers that he does not know what he is talking about. Ayatsuji then lets him go after surmising Kubo's hallucination to be a monkey, while the Engineer glares for the last time at the detective before alighting the train.

At the Military Police Special Investigation Headquarters, Tsujimura notices Kubo's tracking signal that started moving again. Asukai points out his location to be at the subway entrance near the harbor, thinking that their target might have gotten on ground due to their satellite resuming its tracking. Relieved that they were able to previously implant the tracking device in the suspect, Ango deduces that Kubo is planning to escape by boat and urges to track him at once before going out into the ocean and getting out of their reach.

Tsujimura immediately storms out of the HQ, planning to secure and question the Engineer as soon as possible. Ango asks whether she is acting out of her job or out of personal vengeance. Bent on finding the mastermind who pushed her mother into the path of killing in Reigo Island, Tsujimura nonetheless calms herself and asserts that she is acting as part of her job, particularly as part of the Special Division, who must secure the culprit behind the Deputy Director's murder.

Ango then allows her to do so on the condition of capturing the Engineer alive, as they must still find the true criminal behind. He also tries to suppress his worries of Tsujimura's emotions getting in the way that might put Kubo's life at risk, but Tsujimura cuts him off and promises to carry out the mission of bringing him in alive. As she sets out to get her car, she assures herself – albeit anxiously – that everything shall be fine and that she shall catch Kubo alive before he gets killed.

Characters in Order of Appearance

 * Kubo
 * Yukito Ayatsuji
 * Natsuhiko Kyōgoku (mentioned)
 * Mizuki Tsujimura
 * Ango Sakaguchi
 * Asukai
 * Mizuki Tsujimura's Mother (mentioned)

Abilities

 * Another (mentioned)