Nanami-chan

Michi and her parents have just move into the Happiness House, a bizarre neighborhood built atop a giant tree. As Michi ventures into her new room, a strange nut falls from one of the tree branches on the ceiling, revealing a small creature inside called Nanami-chan. The two quickly become good friends and begin to explore the Happiness House, discovering its secrets, meeting the neighbors, and teaching Nanami about the world, from daifuku to astronomy.