Shugo Chara Kidnapping!
Amu is home alone while her parents go to Ami's school play. Her parents ask her to sign for a crab, that was sent by her grandmother. After a bad encounter with the crab where Miki is caught, Amu goes to meet her parents at a French restaurant. Because Miki is pouting, Amu decides to leave the three at the front of the restaurant. However, Nikaidou steals them. Thinking that they ran away, Amu searches for the Guardian Characters. While searching, she encounters Yoru, who tells Amu that he and Ikuto saw Nikaidou steal Amu's Guardian Characters. Yoru takes Amu to Nikaidou's place, but he leads her through all of the weird cat trails. Amu almost falls off a tall wall, but Ikuto saves her and takes her to confront Nikaidou. Nikaidou is too powerful and he gets away while Ikuto protects her from Nikaidou's powerful X Egg magic.
Aired 01/03/2008EP 21 - Shugo Chara Kidnapping!

Shugo Chara!
Amu Hinamori is a 5th grade transfer student who is fashionably cool, tough and independent. Despite this, she is also a girl who seems unapproachable, both at home and at school. In reality, the "Cool and Spicy" role she plays is just a facade that she unconsciously plays. With her guardian characters, she fights the Easter Company who is extracting people's eggs to create X Eggs & X Characters in search of a special egg called the Embryo.
(Source: Crunchyroll)