I thought this one was dead but apparently got another chapter in a time spawn of.... like a year.
Here's the summary
"Fumi Koito used to be raised by an old housekeeper named Hatoko Natsuyaki. He would call her "Peppermint Nanny" because she would eat his leftover peppermint candy drops—because he hates how they taste—then breathe into his nose because he likes the smell.
Now Fumi is in his mid-20's and living on his own as a cram school teacher. One day a little girl no more than nine years old shows up at his house. It turns out she is his old nanny who misses cooking and tending to his every need. But because she is pushing eighty and has grown too frail, she drank a mysterious bottle of medicine to regain her youth—and accidentally drank too much.
Thus begins their new life together, with the reader frequently left guessing who is taking care of whom."
Weird plot but nonetheless amusing, i would feel weird too to find the woman who for some years raised me to knock on my door looking like a child and start living with me.
Maybe i'm intrested in the story because a bias (i hope i am using the correct term, i mean i feel inclined because past experience) since i was raised by someone else that wasn't my blood-related mother.
The second chapter... GOD FUCKING DAMMIT, FUCKING NINJAS WITH THEIR GODDAMN ONIONS.
Regardless i think it is worth a try reading it.
The manga goes around his nanny feeling that even though she is young, her body isn't good enough to take care of Fumi also the implication that she looks like a child despite being an almost 80 years old woman (her mental age doesn't fit her physical age nor does her habits) and Fumi not being a child anylonger and acting more as an adult (on the chapter 1 you kind of get how he behaves).
