Sae and Hiro continue to explore Hokkaido with their class. Back home, Yuno is still trying to think of ways to impress Nazuna and Nori as their upperclassman.

Yuno and Miyako's plans to spend the last day of Summer having fun is thwarted when a typhoon settles in, so everyone retreats to Hiro's apartment for some food. Afterwards, Yuno looks over her summer homework. As school resumes the next day, a fire drill is held, during which Nazuna feels the need to go to the bathroom.

The school holds a swim meet, with Miyako, Nori and Sae competing whilst Yuno is part of the camera crew. Nori, Sae and Miyako all manage to win their events, bringing their overall team to victory. Afterwards, everyone checks the school's homepage to see the photos Yuno had taken.

September 17th-19th: Having inadvertently told her parents that she knew how to cook, Nazuna asks Hiro and Yuno to teach her how to make chicken karaage and miso soup for when they come over. When something goes wrong with Nazuna's rice, the others help her make the most of it. Septembet 28th: After Nori wakes up in the middle of the night following a bad dream, she goes over to Sae's apartment, where the two spend the whole night talking.

September 25th: Yuno and Miyako spend the day drawing themselves as a class assignment, while discussing various things. Yuno decides to ask Miyako to come over so they can continue talking after school. September 29th-30th: Hiro worries about what she is going to do after school and is upset at the idea of not seeing everyone as much. Fortunately, she has plenty of caring friends around her to help her out.

Yuno's class is tasked with designing a pamphlet for an upcoming school festival. Yuno works hard on her design and it ends up being chosen. Later, Yuno is invited on a date by Arisawa, where they catch up with each other.

October 11th, 30th: Everyone is busy preparing for the Yamabuki festival. Yuno and Miyako's class vote to do a Haunted House. After Miyako sprains her fingers whilst building props, Yuno helps her out with various things until her hand heals. November 3rd: The day is finally here. Yuno and Miyako explore the festival in the morning before their shift at the haunted house. Later, Yuno bumps into some unexpected guests.

The Landlady finds a Game of Life board game lying around and brings everyone together to play it. The gang decide to personalise the game into a 'Hidamari Apartments edition'. Whilst playing through the game, the gang receives a call from Chika, which proves embarrassing for Sae since the game forces her to act like a cat. As the game goes on, Nazuna and Nori learn more about the apartment whilst everyone wonders about the Landlady's actual job. Nori ends up winning the game whilst everyone thinks about their futures.

December 2nd: On a particularly cold day at Yamabuki High, Yoshinoya-sensei endures the cold to show off her latest outfit to the class, Miyako decides to start writing Tanka and later Miyako and Yuno decide to have an "educational" snowball fight. December 15th: Chika makes a surprise visit with news for Sae from their parents. After talking with Sae, they then join the rest of the girls for a gyouza party. After the girls realise that Sae and Hiro will be leaving Hidamari Apartments in 3 months time, Miyako decides to create the "Hidamari Cheer Squad" to help Sae and Hiro get into their colleges of choice.

December 22nd: Yuno, Miyako and 2 of their classmates visit Yoshinoya to help her clean up some old art books. Whilst there, they meet an unexpected visitor. December 21st-24th: The girls are preparing for their Christmas Party at Hidamari Apartments. Sae invites Natsume, remembering that she had wanted to visit before.

New Years Eve is here and this time all the girls will be spending it at Hidamari Apartments. Whilst Sae and Hiro are at a study session, the rest of the girls clean up and prepare for festivities later. Later, after the bells chime in the New Year, the girls all visit the shrine, where they meet other friends and acquaintances. After watching the sunrise together, the girls then return home to sleep and contemplate the coming year.