Constellation World (星座, Seiza, Constellation) is a relatively large area accessible by going up the north path in Candy World.
The Constellation World is a rather big map consisting of a skyish-looking main area and 12 smaller rooms. The ground and walls in this area appear to be made of blue sand or rocks, while the background resembles a starry night sky. Throughout the map various constellations and clusters of stars can be found floating around. Using the Glasses effect near a cluster of stars will often connect them together with thin white lines, creating a new constellation.
This area is mainly uninhabited save for the Zodiac signs, each residing in its own room, which can be randomly accessed from the north-east teleporter coming from the Butterfly Forest entrance. Some of the signs can be killed (Aries, Pisces, Virgo and some more), some won't react at all (Aquarius, Libra, and Sagittarius), Scorpio and Cancer will hurt you when trying to kill them and Leo will roar while Urotsuki is backing away.
Coming from either Candy World you will end up in a area with two teleporters, both of them looking like a small bunch of colorful stars. The mentioned north-east teleporter takes you to one of the 12 rooms and the south-west teleporter takes you to a bigger and emptier area similar to the one you came from.
In older versions of this world, a blue butterfly could be found in the opening area, that would teleport you to the Butterfly Forest as well as open the path back in the form of a corresponding blue butterfly. This butterfly has since been removed, although the corresponding one in Butterfly Forest is still present if you've visited the world already.