It's only a promotional manga for the novel so yes, it is in fact a oneshot
Darn so there will really be no more Chapters?
Yes. Our best chance is to wait til the novel is translated
Yes but now I need a link to the novel
Yep, but its in Korean and you have to pay for it
Dangnabit
The ending of the first chapter makes it seem like it’s just the beginning. It doesn’t look like a one shot, despite the tag.