Manyu Scroll

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.

Kaede and Chifusa try different techniques from the Manyuu Secret Scroll to try and enlarge Kaede's breasts. After several failed techniques, Kaede stumbles upon one she likes, which involves sucking milk out of a larger breasted woman's bosom. Chifusa attempts to protect her chest, but eventually gets pinned down by Kaede, who begins to suckle greedily on her chest for the whole afternoon.

Kagefusa forces Ouka to perform the Chichi-togi on her breasts and recurringly teases her with her bosom. When Kagefusa begins to lactate due to Ouka stimulating her nipples, she tries to spray her milk on Ouka telling her it will enlarge the size of her own chest if she drinks it. However, at this point, it is revealed that the entire sequence was just a nightmare that Ouka had.

In a world in which having large breasts means everything, the successor of the powerful Manyu family, Chifusa Manyu, defects and steals the Manyu Scroll of Secrets (which contains all the Manyu secret techniques for breast enlargement), but is wounded during her escape. She is found by a woman who was recently attacked by Kagefusa, a Manyu assassin and Chifusa's sister, resulting in her breasts becoming small and effectively making her poor. The woman becomes jealous of Chifusa and attempts to sever her breasts in a fit of rage, but Chifusa manages to calm her down. As Chifusa is about to leave, she is confronted by Kagefusa, who had also captured Chifusa's comrade, Kaede, and severed her breasts. As Chifusa stands against Kagefusa, she uses a special technique which steals Kagefusa's breasts and adds them to her own. As Kagefusa is forced to retreat, Kaede decides to join Chifusa on her journey.

Running low on money, Chifusa and Kaede earn some money by utilising Chifusa's assets. They go to an inn run by a well-endowed landlady. However, this landlady turns out to be a Manyu assassin who drugs both Chifusa and Kaede and then hypnotizes them with her breasts, intending to turn them into her lesbian love slaves. However, before she can finish taking control of their minds, the hypnotized Kaede pounces at the landlady's breasts, releasing Chifusa from the mind control effect and giving her the chance to absorb the landlady's breasts. As they move on, Chifusa comes to realize about her ability to alter a woman's breasts using the Breast Flow technique, and vows to learn more about it so she can return Kaede's breasts to normal.

Having not eaten for days, Chifusa and Kaede get a job at a maid bar, but soon get fired due to Chifusa's short temper around the rowdy customers. Collapsing due to hunger, they are rescued by a man whose daughter was stricken by a mysterious breast disappearance. The man asks Chifusa to take his daughter's place in a contest against a neighboring village to please Hatomune Mie, a rowdy landlord. The opposing team sends a Manyu assassin to attack Chifusa, but she manages to beat him and wins the contest the next morning. Although Hatomune later hears word about Chifusa's true identity, he allows her to go, having been mesmerized by her breasts. After she leaves, Hatomune vows to find Chifusa again and get to touch her breasts.