The twelfth episode of the anime Jijou wo Shiranai Tenkousei ga Guigui Kuru begins with a Christmas party attended by the main characters of the series. After their day at the park, the main characters Takada and Nishimura experience an unusual awkwardness between them, which their friends at the party notice.

At the party, a lively gift exchange takes place, with various funny and practical gifts being swapped among the friends, such as a small lip balm for Takada and fake mustaches for the others. Amid the fun, the friends express their concern about the strange dynamic between Takada and Nishimura.

As the party continues, Nishimura and Takada step outside to have a private conversation. Surprisingly, Takada confesses his feelings to Nishimura and even asks if he can kiss her. Nishimura is stunned and says that his first kiss should be with someone he truly wants to kiss deep down. To her surprise, Takada insists that she is the one he genuinely wants to kiss from the bottom of his heart. Their conversation is interrupted by their friends, who call them back inside.

Back at the party, the friends continue their celebrations, though with a slightly unusual atmosphere surrounding Takada and Nishimura. As the evening transitions into the new year, Takada and Nishimura share a heartfelt conversation about the past year and how much their friendship has meant to both of them. Nishimura thanks Takada for filling the past year with precious memories, which he also deeply appreciates.

While visiting the New Year's shrine, both hint that their wishes align, possibly hoping for their friendship to grow even further. They reunite with their friends at the shrine and exchange cheerful greetings, with Nishimura reaffirming her belief that Takada's behavior was just his usual openness.

Back at school, the seating arrangements are changed, and Takada and Nishimura end up sitting next to each other for the second time. The episode concludes with Nishimura expressing her admiration for Takada's straightforward demeanor, subtly hinting at her growing feelings for him.