1/ idk
There was this really powerful and kind magician, Clow-san. He was so strong, he created Kero-chan and Yue-san and all the Clow Cards! And they were all really happy together... But Clow-san passed away. And before he did, he arranged it so that those that were precious to him would be able to be happy once more... So, he put the Cards to sleep, together with Kero-chan and Yue-san.