OVA included with special edition of volume 5 of the Mikakunin de Shinkoukei manga. Mashiro and Kobeni share with each other a story from their pasts. Kobeni retells an episode of her childhood with Benio and Nadeshiko while Mashiro describes one of her days back on her home in the mountains.

Although Yuuta Togashi and Rikka Takanashi have just started dating, they do not know how to progress their young relationship. Due to both of them being shy, neither of them are capable of making the first move. Rikka decides to ask her class representative Shinka Nibutani for some love advice, and she advises Rikka get closer to Yuuta during the Christmas season. Following the suggestion of Yuuta's friend, Makoto Isshiki, they hold a Christmas party at Sanae Dekomori’s place. During the party, Yuuta notices Rikka has gone missing and searches for her. When he finds Rikka, he notices that she is acting strange and quickly figures out that she and Sanae are both drunk! How will this Christmas party turn out for the budding couple? [Written by MAL Rewrite]

Namakura Gatana, meaning "dull-edged sword," is a two-minute comedy about a samurai who, thanks to his dull instrument, loses every time he attacks a weak opponent. In order to examine the sword, he tries to attack passers-by, but lower-class townspeople fight back and knock him down. (Source: AniDB)

The Edo period of Japan gave rise to a clan of warriors with a very specialized, magical skill. The clan was known as the Manyuu, and the skill was the ability to administer a sword strike that could shrink the size of a woman's breasts. This might not seem like an ability that could exert power over a land, but in Manyuu Hikenchou, large breasts denote status, wealth, fame, and influence. Grave concern has arisen in the Manyuu clan due to the actions of their chosen successor, Chifusa. Disgusted with the breast obsessed society that the Manyuu have created and perpetuated, Chifusa has not only deserted the clan, but also stolen the sacred scroll that details their techniques to growing and severing breasts. Fortunately, Chifusa is not completely alone. Her fellow warrior Kaede is sympathetic to her cause; a sympathy that could place her in considerable danger. Now wanted by the very clan that raised her, Chifusa must defend her life and Kaede's while seeking to undo the damage their brethren have done to the land. Along the way, Chifusa will discover that she harbors a power that goes far beyond the scope of her training, one that could help shape and change the land that she seeks to bring equality to.