It's weird.
There was the set up for an interesting plot with the one girl finding his brother's core, but that seams to have been dropped (for now).
Right now the story feels like it's trying to be an improve the demon's quality of life/build friendly relations with humans story. But the story at this point lacks the set up to be that kind of story. It had a small bit of what makes those kind of stories but, because they haven't really built on it in a while, it's crumbled away.
That combined with the lack of any connecting tissue between these short stories is making this feel like an 'and then' story.