Shougo Mikadono's father has just passed away, and now he must become the head of Mikadono Group, his father's company. After completing the training to take over, there is just one other stipulation he must adhere to: he will need to find a girl he loves at his new school and marry her by the time he graduates high school. Shougo transfers to Miryuin Private Academy, and it seems like he has many girls to choose from, such as Konoe Suruma, the class representative as well as his first new friend; Miyabi Kannagi, a standoffish but kind girl; Rinka Kunitachi, the student council vice president; Mei Sagara, who runs a cafe and dresses like a witch; and Mana Tendou, the student council president. However, there is a complication: one of them is his long-lost half sister, and he has no idea which one, so how can he become romantically involved with any of them? [Written by MAL Rewrite]

Unaired 13th episode of the TV series.

In an alternate universe, shy, awkward Yuki Nagato attempts to court her crush, Kyon, with the help of her best friend and neighbor, the perky and indomitable Ryoko Asakura. Together, the trio defends their high school literature club from extermination…and from the pestering of their over-the-top classmate Tsuruya and her friend and minion Mikuru. (Source: FUNimation, edited)

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]