You feeling good today and walked outside in the village and then you see a bamboo muzzle on the Ground and you picked up it and put it on because you are  Curious BUT you feel… Weird Your legs suddenly become weak  and you fall to your knees and Transform into an upper moon wow… you
Figured out What Happened and you Are still a good Person so you are like Nezuko now  Your legs are still feeling weak, so you crawl into a box