AR in Maojo de Oyasumi
 

Here's another AR I found, from a new and ongoing manga called Maojo de Oyasumi, or "魔王城でおやすみ" in Japanese.

From what I understand, the protagonist is a young princess who was kidnapped by demons, and while waiting for people to save her, she decided to sleep since there was nothing else to do. Because she ended up liking it the Demon King's castle and the story is told with comedic RPG elements, she constantly tries to find new means to sleep. In volume 2, she finds an hourglass and flips it, and ends up regressing into a toddler, staying that way until the end of the chapter. The AR is sadly poof, but is it cute and leaves her in baggy clothes.