Oh boy, a yandere. Im a bit glad this wasn't put into the anime since i'm personally not a big fan of that trope, but I get why its included in this. I think i'll tolerate it.
I came to read the manga from the beginning after finishing the anime, but it seems like there's gonna be some couples that were left out. This pairing seems neat, hopefully it isn't overdone (or done too repetitively? Don't know what word to use)