Chapter 106.5

In The Small Room, Part 2, Section 2 (キニテ 其の弐 後編,) is the second part of the 106th chapter of the Bungo Stray Dogs manga.

Synopsis
Fire above, water below—trapped in Dostoevsky’s hellish torture chamber, Sigma and Dazai only have one slim chance to escape!

Summary
With Sigma and Dazai struggling underwater, Dazai points to a gun hidden on Sigma's person. The latter fires at the doors to break out of the elevator, but to no avail. Soon after, upon noticing that the fire has dissipated, Sigma swims towards the surface, only for Dazai to catch and drag him back to the water. Sigma then notes on his naïveté for trusting Dazai, a man on the same fiendish league as Dostoevsky.

However, Sigma soon retracts his distrust for Dazai when he realizes that the fire has disappeared because oxygen has run out; swimming up to the oxygen-devoid surface would only result to instant death once struggling for air underwater. Sigma then acknowledges that, had Dazai not stopped him, he would have died from Dostoevsky's four-sided counterattack.

Before they can run out of breath, Dazai uses Sigma as a foothold and swiftly emerges to the surface, using Sigma's gun to shoot the elevator mechanism that has a different, weaker armor from the elevator itself. Once Dazai breaks the mechanism and cuts the wires, Sigma pries open the opening elevator doors, allowing him to emerge to the surface and breathe safely once again.

The elevator's drop collision sequence, however, activates after detecting interruption in the flooding. With Sigma and Dazai falling off inside the elevator, Sigma attempts to grab on to the ajar elevator doors but is too far from it and is unable to due to the acceleration of their descent. Dazai reminds him of his promise to bring him back alive and forces him out of the elevator. As he entrusts the rest to Sigma, Dazai is left inside the elevator that finally descends to its obscure pit.