Kiriwo's expression to Iruma: Let's commit suicide together Iruma-kun.
Me: I don't know why he brought up a line that Dazai Osamu uses to court a woman: Join me in a double suicide.
Dazai Osamu from BSD raises his hand and tells Kiriwo that if that boy named Iruma doesn't want to commit suicide with you, can I do it for him? Kiriwo then looks at Dazai as if he's disgusted by him, much like how Kiriwo reacted in the main manga series when Ocho said he made Iruma fall into despair.
I think the demon Kiriwo and the human Kiriwo would get along quite well.
In the main manga series, Iruma, the bombshell, uses her ring magic at full power to break Kiriwo's barrier and thus Iruma saves the school, and considering that Kiriwo is Iruma's nemesis, she had to use her bloodline magic to save Iruma.
In the case of this series, I don't know how Iruma would save people or how Kiriwo would plan to save Iruma.
And if they're going to have me after the main manga series, after Kiriwo's arrest, Iruma meets Azazel Henri, I think that might happen in this manga series too.