S0E1 : Beautiful Breast Training: Breast Sharpening

Kaede performs the Chichi-togi (Breast Polishing) cleansing on Chifusa's breasts to keep them from sagging after they become increasingly large due to her defeating Manyuu Assassins. However, on this occasion, Kaede tries a new form of Chichi-togi that she thinks will also enlarge her breasts...the boob-on-boob Chichi-togi.