wtf, this is not "The Reincarnated Villainess' Dark History" right?
i thought that "Ghost seeing school boys black cloak" is chapter title, but could it be manga title?
Story placement depends on if it was published in the same manga volume as the villainess story - some artists have permission from editor/publisher to post an unrelated one shot in the back of their ongoing manga to see if there is any interest in it - if so it might be allowed to be developed into a full manga. Or, it might just be a chance for artist/author to tell that particular one shot story because it would not get published in any magazine otherwise
For all of you complained, please refer to ch1- the volume content. You will understand. Anyways, please do your research before criticizing scanlators.