Manyū Hiken-chō (魔乳秘剣帖, lit. “Magic Breast Secret Sword Scroll”) is a Japanese manga series written and illustrated by Hideki Yamada. Set in a parallel version of the Taihei Edo period, the series follows the busty kunoichi, Chifusa. An anime adaptation produced by Hoods Entertainment began airing in Japan in July 2011. In a reign ruled by the Tokugawa shogunate, big breasts mean everything. Those who have huge breasts are guaranteed wealth and popularity. The women who lack them are not considered “human”. Members of the ruling Manyu Clan help raise future big breasted women. Written on a secret scroll possessed by the clan, there are said to be various techniques on how to grow big and beautiful breasts. Chifusa is to be successor of the clan. However, she takes the secret scroll and runs away with it, hoping to fight against the cruel world that the Manyu Clan has created.