Since Inomata hasn't been visiting very often lately, Inomata takes Kotaro out of the daycare room to find her. Convinced that she hates Ryuichi, they try to make a case for him. Later, Kazuma gets a cold, forcing Takuma to come to school by himself. He seems to be smiling and playing as usual, but...

On a Sunday, Ryuichi heads out to hang out with his classmates, leaving Kotaro behind for the first time. Kotaro is sad about having to stay home with Saikawa, but things pick up when he finds the family library. Later, around Christmas, the kids are all waiting for Santa to come. Ryuichi wants to dress up as Santa to make Kotaro happy, but a few obstacles present themselves...