An Unheard Voice, Sorrowful Feelings.
When Amu and Ami when out shopping, they again met the suspicious boys that she once gave taiyaki to before. There, they saw posters posted all over the town for a classical music concert presented by the Easter company. There was a photo of Ikuto on the poster with the name "DL". They planned to sneak into the assembly hall to save Ikuto but the guards there were quite strict. So, they began to try a bunch of different tactics. Source: crunchyroll
Aired 15/08/2009EP 45 - An Unheard Voice, Sorrowful Feelings.

Shugo Chara!! Doki
With things having quieted down a bit for the Guardians, they can now focus on things besides fending off the peril of the evil Easter Corporation. Amu is having some troubles deciding which guy she likes the most, and hiding Ikuto in her room. Not only does the Embryo still elude the Guardians, and worries of Easter being suspiciously inactive, the threat of a new X Egg appears...