This is a scene in episode 19 of Yes 5 Gogo, the Karen/Kurumi episode with Urashima Tarou tale.
Just like before...Karen is thinking back to episode 34 of Yes 5 first season, when she engaged in a backhorse sword fighting to protect Milk.I'll protect you once again.That form is more comfortable for you, isn't it...?Karen...!!Kurumi... Milk, wouldn't it be better for you to turn back?