Like most of the stories on this, we start out at a world meeting in Washington. When little murder child Alaska shows up crying. Freaking out the countries and running into the waiting arms of America. Aaand that's all you get.
Quirks that just popped up some day on my mind. These quirks aren't metioned in the Manga (so far I know so till chapter 160).
And if they do then I missed it.
You can use these ideas for your own ffs that would make me happy!