The Legendary Shinobi Appears
As the girls train in summoning animal spirits, Asuka is the only one having trouble summoning hers. Her grandfather, the legendary shinobi Hanzou, comes to visit and informs her that their family's spirit is the tree frog, which Asuka is afraid of. As Asuka attempts to get used to frogs, Hanzou informs Kiriya that the evil Serpent Girl's Academy is behind the puppet attack. On their way home, Asuka and Ikaruga are attacked by one of the enemy shinobi.
Aired 13/01/2013EP 2 - The Legendary Shinobi Appears

Senran Kagura: Ninja Flash!
Super cute Asuka and her curvy companions appear to be your typical high school students, but they’ve got an outrageous secret: they’re learning the wild ways of the ninja! Get a lesson in action, naughtiness, and sexy slapstick fun as Asuka's gang takes on the toughest (and hottest) fighters in town! Fan service fanatics won’t want to miss a minute!
(Source: Crunchyroll)