Looks cute, and I think it's an extension or a few chapters, sorta like an special edition... If I remember well Aki wanted to do another thing apart from LoM, sorta like Reimu telling stories
I'm not sure if 'Reversed Roles' is the right way to describe this series... it's the ages that are reversed, the roles are pretty much the shame. Sakuya is still the maid, Hong is still the (useless) gate guard, Patchy is still an otaku shut-in...