im confused..cuz i don't think harada sensei did only the cover but not a oneshot? like why would someone make a cover if they're not making a oneshot on it? but at the same time she's a famous mangaka so its weird if she had a story for this and no one uploaded it???
also don't this type of things come all together in one book? how come it's always some of them that get scanned and translated and not all of them if they're not published on the same book/magazine how does it work