Nya's Shugo Chara: The Heart's Egg
Every child has an egg in their heart, an egg of their soul, but it's unseen. If you start to worry, the egg will turn into darkness.
Inside, the egg will turn into an X egg.
One morning, Nya was sleeping in her bed. "What a great dream," Nya says happily. Suddenly? someone barges in her room. "Nya!" Kai says happily. "It's Easter day today! Yay!!!" Nya runs downstairs. "It's Easter, it's Easter!!"