Samurai Training With Master Kozaru?!

Synopsis

Burton and the others are suddenly attacked by a gigantic youkai. They all launch attacks, but nothing fazes the youkai. Worse, they take a counterattack and tumble off a cliff. After narrowly surviving, they return to Genshusai and start coming up with a plan for the giant youkai. To take on such a powerful enemy, Banji and Yoshihei try to become Kozaru's disciples and ask for help, but...