@Argolok I get where you're coming from and what you're saying. One shots are often simple because they're a short story and don't require a lot of planning for future events, so fourth. However, I do think you're underselling them a tad, some of the best one shots may be short, but they convey their ideas extremely well. In my opinion some short stories are incredibly well thought out and beautifully drawn, so I wouldn't say they're just "easy and simple" all the time. Some of them are, like this one for example is simple, but still it conveys the idea and point well. I'd definitely agree that comparing manga and one-shots to each other is generally something people shouldn't do, and while it'd be nice for the author to expand on a one-shot at times, it's also sometimes best for it to just be a one off since it completes the entire idea. Expanding on an idea can kill some of the original impact that the short format had, and the idea of the story can grow tired. It's definitely a challenge to keep a reader invested in an entire series. However there are those cases where a one-shot gets made into a serialized series and it's an actually genuinely amazing series. It all depends on the author and the one-shot.