Why don't they just confront the sister and tell the little bitch to "fucking grow up"? So what if she's related? Even more of a reason for her to stop being a fucking cunt.
@JayJay_Tracer No need for name calling. Hachimitsu is correct about it being volume 4; volume 3 ended with chapter 17. This wasn't a big deal when there was only one translation, but its a problem now because mangadex isn't detecting that the 2 translations of 18/19 are duplicates. So you end up going through the chapters twice. @gorebeetle can you update your chapter titles to say Volume 4?
I heard the guy had IRL issues, but now has time to work on manga again. He said that chapter 20 would be coming soon as well.
It was written on his website.