Momose and Shirosaki's next business trip takes them to Shirosaki's hometown in Akita Prefecture. Shirosaki is triggered by the trauma of being snatched up by a namahage demon as a child during the local festival, but he is able to complete their field research safely. Previously, Shirosaki received a phone call from his grandmother saying, "I have something I want to show you," so the two head to Shirosaki's family home. At his grandmother's suggestion, they look at and reminisce over old photo albums when his grandmother reveals that "what she wants to show" is something Shirosaki never expected.

At Kinjo's suggestion, the four hold a Christmas party and bring presents. Momose continues his daily search for a new property as he decides where to move but is saddened that his fun life living together with Shirosaki will come to an end. After the party, and after much deliberation, Momose decides to move forward and contacts a real estate agent to assist with his move. And finally, the day of his move arrives...