Holy mother of secret meanings and foreshadow chapter.
You know when a story, a plot, is well made, when the author have it all already in the mind, from the start to the end, and can control it by every least detail in a subjective chapter like this.
I don't finished the manga, but i can see it cleary in this chapter.
The secret about who is Kaiman/Aikawa is all there, right? But we can't understand yet.