Shounen Onmyouji EP7 - The Hatred of the Woman Controlled by the Enemy

One night, Akiko is called by a familiar voice. It turns out to be her cousin, Keiko. Keiko attempts to lure Akiko out of the palace and Seimei's demon-repelling barrier, but Akiko notices that there’s something wrong with Keiko. The next day, she gets Masahiro to investigate what’s wrong with her cousin, who is supposed to be in bed sick.