Yue and Nodoka were practicing their magic spells when they stumbled upon the Red String of Fate. This spell was said to tie you to your destined partner. Out of curiosity, Nodoka casts the spell and she ends up being tied to Negi. However, upon inspection, they realize it's simply a red string with magical properties that cannot be cut. Meanwhile, Ayaka extends an invitation to the entire class for a complimentary visit to her family's newly opened spa resort. With Nedoka and Negi unintentionally tied together, they must navigate through their day trip without crossing any lines.