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 in the room with cameras and he was lying on the floor, motionless. Nikolai sat down in front of him.

Nikolai looked emotionlessly at Sigma’s body. He also noticed a knife wound on Sigma’s stomach, which was probably made by Fyodor, since there was one pistol and a bloodied sharp knife in the room.

"Sigma-kun..."