V: Flashback
A long, long time ago King Clow was single. Many wanted to marry him since he was powerful, kind, rich, and friendly-all wonderful traits in a husband. During that time, Madoushi was a fairy from another land and the other fairies weren't born yet. She and Clow met briefly a few times and each time she grew more and more enamored with him. Clow considered her his good friend and sought her advice later when he was working on the Mokona Project.
Clow met Yuuko while he was working on the Mokona Project. Yuuko, a powerful witch, offered her assistance at a price, and together they created the Mokonas. They considered their relationship purely business. They did not get along at all, to the point one might say they hated each other.
Of course, we know that hate turned into love. One late summer night, Clow proposed to Yuuko while they were sipping sake together in Yuuko's odd house, enjoying the full moon. It was a romantic moment, broken only when Yuuko's snore escaped her lips.
The next morning, Yuuko was trying to get rid of her pounding hang-over, when Clow casually passed her the hang-over medicine and popped the question (again). This time Yuuko said yes. Ah, if only Clow knew Yuuko had foreseen that romantic moment and decided to get drunk and fall asleep on purpose. Then again, he might have; Yuuko was infuriating like that. They both were.
Madoushi had gone to Clow's house to confess her love. She was redirected to Yuuko's house by Clow's housekeeper, Yue, and had masked her aura and witnessed both the romantic proposal and the morning after in silence. After Yuuko accepted, Madoushi returned to her home, wetness blurring her vision. She cursed the blinding rain; did it not have any regard for her sadness? She was trying to cry, damn it!
Madoushi broke down sobbing. Didn't Clow realize she was so in love with him? Didn't he know she was in love with him ever since she met him? How could he do this to her? She was hurt, angry and heartbroken. So she did the only thing she could do: she cursed the pair, at the cost of her life. To limit their magic so they could not see the future, among other things, she gave up her mortal life.
But Madoushi's thirst for vengeance was not quenched.
