Apparently, Kouki could not admit the reality of Kaori falling for Hajime. It was not something that came out of the blue as Kouki was the only one who didn’t notice it, but in Kouki’s eyes, he only saw it as Kaori suddenly doing something strange and the cause being Hajime. Really, Kouki’s mind that only saw things in the way that would be convenient for him made Hajime retort instinctively.