Six months have passed since the polar opposite classmates Miyu Suzuki and Yuusuke Tani started dating. Through spending time together along with their friends from school, the two have been happier than ever. As the year nears its end, the new couple plans to celebrate Christmas and the New Year together, making memories for years to come.

Meanwhile, Miyu and Yuusuke's friends Shuuji Taira and Kentarou Yamada are puzzled by their own situations. Due to his bad experiences in middle school, Taira still overthinks everything around him, especially after his classmate Shino Azuma began giving him more attention. Simultaneously, the usually energetic and outspoken Yamada finds it difficult to find the perfect time to confess his feelings to his shy schoolmate Natsumi Nishi. Despite everyone's differences, they continue enjoying their adolescence together and find their own ways to turn the winter break into a cherished memory.