After reading the previous chapter, where Okaya sees Nagare as his "enemy"...
I think the surviving member of the gang; fatty and kinugawa are lot brighter than the previous idiots Maria had killed, because it seems like they're well aware of how unhinged and manipulative can Okaya becomes, and Kinugawa seems to have seen Okaya within Maria.

A theory about what Okaya is: the psycho kid who's too smart for his own good, ended up seeing the world to be so boring because it's all just so predictable in his mind.
He prolly join the bullies hoping to get sanctioned or punishment, but no, he didn't, all's probably due to his status or something.

And since then, he'd keep on tormenting others for fun, until Nagare comes and broke his view. Despite being tormented, Nagare, though scared kept his ground and endure it, and even going on a length to save others, even if it meant hurting himself like an idiot jumping onto his own death.
Nagare's selflessness was something Okaya hated, that he considers him as an enemy. Because it broke the view he'd long formed from his experience being "helplessly" enabled by those around him, "the strong, rules over the weak."

Now, this is a theory: but what if Okaya kills Nagare because he'd learnt that his enemy's selflessness was coming from how he was raised and taught by his parents? And after knowing that, he also knows that Nagare's death would serves as a Martyr that condemn him and all the other bullies, calling forth a judge and an executioner to have them pay for what they did? He'd also probably thought this with the feeling of excitement, like how the fatty points out that while Kinugawa couldn't be reached out, Okaya looked rather enjoying it.

Can we talk about the fact that NONE of the bullies acknowledged their mistakes and they never felt guilty about torturing other kids even when they were on the verge of death? So sickening.

I tthink Kinugawa mistake our mommy with okaya because okaya is source of fear for kinugawa.

First he ripped his ears off now his eyeball? Is he some sort of undead monster? I'm starting to scare of him

This man has to be on steroids, there is no other way

Sweet Saint Sebastian

…wait what.

Are the images smaller than usual? Not that I can complain since I'm grateful I can read it.