Extra episode of Nagato Yuki-chan no Shoushitsu bundled with the limited edition of the 9th manga volume.

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]

Chiyo Mihama begins her high school career as one of the strangest students in her freshman class—a tiny, 10-year-old academic prodigy with a fondness for plush dolls and homemade cooking. But her homeroom teacher, Yukari Tanizaki, is the kind of person who would hijack a student's bike to avoid being late, so "strange" is a relative word. There certainly isn't a shortage of peculiar girls in Yukari-sensei's homeroom class. Accompanying Chiyo are students like Tomo Takino, an energetic tomboy with more enthusiasm than brains; Koyomi Mizuhara, Tomo's best friend whose temper has a fuse shorter than Chiyo; and Sakaki, a tall, athletic beauty whose intimidating looks hide a gentle personality and a painful obsession with cats. In addition, transfer student Ayumu Kasuga, a girl with her head stuck in the clouds, fits right in with the rest of the girls—and she has a few interesting theories about Chiyo's pigtails! Together, this lovable group of girls experience the ups and downs of school life, their many adventures filled with constant laughter, surreal absurdity, and occasionally even touching commentary on the bittersweet, temporal nature of high school. [Written by MAL Rewrite]