Yuuta Togashi and Rikka Takanashi encounter difficulties in advancing their relationship as a result of their timidity. Seeking counsel, Rikka confides in her class representative, Shinka Nibutani, and is advised to employ the holiday season as an opportunity to draw closer to Yuuta. Together with Yuuta's friend, Makoto Isshiki, they organize a Christmas party at Sanae Dekomori's residence. In the course of the revelry, Yuuta realizes that Rikka is not present and decides to search for her. Upon locating her, Yuuta discovers that both Rikka and Sanae have imbibed excessively. How will this development impact the fledgling romance between the two?