Sometimes, Yume's mind makes a weird turn, and this happens.
W.I.T.C.H.N.E.S.S. is based of the quite popular series W.I.T.C.H., while it also has Yumenique tweaks. The main difference is that instead of 5 elements (Energy, Water, Fire, Earth and Air) there are 9 elements (Spirit, Water, Fire, Earth, Air, Darkness, Light, Wood and Metal). The 5 girls from the original series take their respective spots, while the N.E.S.S part is filled up by Nanami, Elyon (who isn't a princess in here), and the twin Shayla and Shaylyn.
It has a base around the kitsune legends.