Nikolai wanted to kill Fyodor, but after Dazai killed Fyodor, Nikolai felt some kind of emptiness inside himself and slight pain/confusion, because even if Fyodor manipulated him, Nikolai really considered him his friend, and it was painful to realize that he died... But he wanted Fyodor to die, right? Moreover, Dazai can do this, he won the prison escape...

Nikolai went into the prison where it all started, and began to look for sigma, thinking about Fyodor’s phrase “He was brave, but he won’t wake up.” Nikolai realized that Fyodor killed Sigma, but he still wanted to make sure of it.

Nikolai found sigma lying on the floor and something was flowing from his mouth, possibly drool, perhaps something else. There was also some of his own blood underneath.

Nikolai was a little surprised. Nikolai looked at the hand that was left of Fyodor, and then left the room and put it away, after which he returned and stood next to sigma.

"Sigma-kun, Dos-kun was gone."

Nikolai sat down on one knee and bent over a little.

"Now you're free, Sigma-kun."

Nikolai took a few strands of sigma's hair, looking at his unconscious body.

"... Hey, Sigma-kun, what don't you wake up?"