Magic Teacher Negima! Summer OVA

Yue and Nodoka are practicing magic, and one spell catches their eye: The Red String of Fate. Supposedly, this spell connects you with your fated partner. Nodoka decides to try it out, and ends up tied to Negi. However, this spell isn't the Red String of Fate at all, but is in fact just a red string that connects two people. A magical red string...