On one dark and silent night, the saint was lamenting the Village's fate and meditating on how to best lead the humans of Gensokyo. That is when she sensed a wave of evil power. She turned around to see the shape of a devil, silhouetted against the moon, thirsting for blood.

Recognizing each other as someone counter to their own being, without hesitation they brought out their full power in a fierce battle that continued to swing back and forth. However, while crossing blades, they developed a strange feeling of kinship. Though their positions were different, they both shared a deep love for Gensokyo. Finally, they decided to join their forces.

As their energies clashed, they both gained some really awesome power, but it came at a price... a super-duper risky curse upon them both.

Alas, cruel fate would not allow such a meeting. The devil's bloodlust overtook her senses, and she sunk her fangs into the saint's neck. The saint's power flowed into the devil, and the devil's into the saint...