Majokko Shimai no Yoyo to Nene

Based on a manga "Noroiya Shimai" written by Hirarin and serialized in Monthly Comic Ryuu. It is a story about a pair of sisters who work as "noroiya" (cursers) using magic in a fantasy world. One day a big tree suddenly appears in a forest, and tall buildings that look like they are from our world can be seen entangled in it. The two sisters go there to investigate and get ported to our world...