Beyond this point contains HEAVY SPOILERS! Please proceed at your own RISK.
In the run-up to Christmas, Ruki feels downhearted over the lack of romance in her real life, so the gang throw her a surprise birthday party on Christmas Eve. Unable to go home due to her parents vacationing in Hawaii, Kaoruko spends New Year's at Tsubasa's home, where she discovers Tsubasa is from a rich family. Later, Ririka holds an event in which the dorm residents burn their unwanted storyboards to cook sweet potatoes.