Poor Kokoro, I can understand why she feels indebted to her master. He rescued her from a life of forced breeding Her backstory is so tragic! She's a trooper though ; u ; Is there a reason why her master let Iris think she was the only one?
For some reason I like the fact that Kokoro has more power than even Haru Ren is cruel to have her betray Butter :I And being so sneaky with that bow.
There's one crit I'd like to add. I think this would work better if Kokoro's backstory was hinted at in chapters, until it comes to a boiling point in one chapter, if that made any sense.
Short chapter, but still very full of emotion and exciting developments. Flame points is building up to even greater developments