Hotaru and Renge are invited to the Koshigaya’s house for breakfast. Afterwards, the girls, accompanied by Kazuha, go to the beach, where Komari’s height leads her to be mistaken for a lost child. On their way home, the girls stop at a railside noodle restaurant, where a prank by Natsumi on Komari backfires due to Renge’s innocence. They manage to catch the last train home on time, but accidentally leave Kazuha behind.

Hotaru gets along with the Koshigaya family’s next door neighbour, Konomi Fujimiya, whilst Komari laments that the two seem more grown up than she is. Later, Komari joins Hotaru and Renge in doing some sketching, where she ends up becoming a model for them. Afterwards, Konomi helps Komari and Natsumi make dried persimmons.

Due to a snowy blizzard, the girls end up having to spend the night at school, with Hotaru and Natsumi competing against each other to see who gets to sleep in a futon, eventually decided to just kick Kazuho out of hers. Later that night, Hotaru decides to check out the snow and see the starry night sky, leading to some misunderstandings from Komari and Natsumi. Later, on another snowy day, the gang decide to try their hand at skiing before building a snow house and having some hot food.

One morning during winter break, Ichijo Hotaru and Koshigaya Komari are on a walk when they run into Fujimiya Konomi on her way back from practice. Komari takes great interest in Konomi’s cellphone.

Beep boop! Koma-plushie is live, boop beep! But Hotaru isn’t a master of robotics just yet, and her pet project still has a long way to go before it’s ready to fly.

Parents’ Day provides Natsumi a particular variety of anxiety, but she finds a way to relax when Renge brings home a new friend.