Penguin Musume Heart Episode 17 English Subbed Episode Title:The Familiar of Rose.Episode Description:Mary is kidnapped by Aka and Riff of Kurobara Communications and leave a letting calling Penguin to rescue her. Kujira is concerned about it being a trap and recommends they make a plan, but Penguin insists on going after her, much to Kujira's dislike. Penguin, Cha Chi and Nene, later joined by the White Knights, show up at the hostage point where Aka and Riff await. Riff sends the White Knights, and herself, down a chasm whilst the others prepare to face Aka. The title is a parody of Zero no Tsukaima.