In the fourth volume of Chi's Sweet Home, Youhei's actions at the end of volume three has motivated his parents to look for a new home for their kids. Chi is moving to a new address; someplace where cats can play to their heart's content without having to worry about nosey managers and mean hungry bully cats. But moving alone will be something of an adventure for Chi. While the Yamada's can handle changing their environment now and then, for a kitten their home means much more than just a place to sleep in. When the old apartment starts to disappear, suddenly Chi starts losing all of her favorite toys and her naps spots. She knows they should be in specific places, the smell is still there, but her nappy spot is gone and so are her favorite scratching areas. And what are all those boxy things? Why are they all stacked so high up? And what's up with all the noise around them? Are there dogs behind all of this?!?