Yuno had forgotten to do her homework in time for Yoshinoya's class and has to finish it during lunch break. After school, Yuno and Miyako play in the snow for a while and later visit Hiro's apartment so Yuno can thank her for the rice ball Hiro gave her for lunch.

Yuno and her friends have been given the task to create a new sign for the Hidamari Apartments, and they set to divide the work equally. Afterwards it is discovered that Miyako's rent is much lower than the others have to pay, and Sae goes to the landlord to discover why. That night, the summer festival starts and Yuno and her friends go and have fun.

Yoshinoya starts her class with her trying to get her students to sketch her in various outfits, but after some intervention from the principal, they settle on sketching a bust of Brutus. Later that day, the four main characters get together in Miyako's leaky apartment.

Today at school, Yuno and Miyako get to go outside during class to sketch something due to the weather being nice that day. Later, Yuno and her friends go to a karaoke bar where Hiro is determined to lose some weight while singing.

Yuno comes down with a cold and has to stay home for the day. While asleep in her apartment, Yuno has several odd dreams of school and of her friends. Meanwhile, Yuno's friends do all they can to help her get better.

Summer has arrived, and once final exams are over, Yuno and her friends enjoy the beginning of their summer vacation. Due to Yuno not knowing how to swim, Miyako gets out an inflatable pool that Yuno and her friends play in, though they eventually go to the beach.

A typhoon hits during the say of the Sports Festival and has to be called off until the next day when the typhoon has already blown over. Later on, Yuno and her friends are in Miyako's room worried that if the drying agents under her floor get wet they will ignite and catch the building on fire. Miyako gets the idea to remove them all, and throws one into the rain outside, but it does not catch fire.

Yuno and her friends have a day off from school today, and after waking up, Yuno starts to draw. Miyako arrives soon after and sits down with Yuno as they draw various things together. Yuno gets a text message from Sae to come to her apartment from the back way; Miyako jumps off the second story to get there, followed by a terrified Yuno. They find out that Sae is hiding from her editor as she tries to finish her next novel before the deadline.

Yuno and Miyako wake up early in the morning and as they are leaving the apartment building, Yuno spots an envelope on the ground. She notices a man not too far away and it turns out he had dropped it. To show his thanks, he gives Yuno four lottery tickets which were in the envelope. At school, a former student of Yoshinoya comes in to talk to Yuno's class, and Yuno starts wondering about her future dreams as an artist. Near the end of the day, Sae buys the evening paper to check the numbers on the lottery tickets, but no one is a winner.

The cultural festival is going on at Yuno's school, but the night before, Yuno had tried to finish a piece for the art gallery but ended up falling asleep before it was finished; Miyako took the painting and put it in the gallery by the time Yuno woke up. At school, Yuno gets praise for her unfinished painting even though she did not intend it to be this way and Yuno's friends all have parts in plays. Later, Yuno and her friends go to a public bathhouse and talk about the festival.

Yuno and her friends go to the zoo for a school assignment to sketch some of the animals. Yoshinoya dresses up like a tour guide and acts like one on the way to the zoo by pointing things outside the window to the students, but soon becomes very carsick and has to stop. At the zoo, Yuno and her friends go around and see many of the animals. Later, Yoshinoya ends up in front of the Hidamari Apartments, and Yuno and her friends take her to Hiro's apartment when she rests for a time. After she leaves, they discuss some of the rumors they have heard about Yoshinoya.

On Christmas Eve, Sae's younger sister Chika comes to visit and gets to meet Yuno, Miyako, and Hiro too. They show Chika around Yuno's school, and they run into Yoshinoya there who later swings by in a Santa outfit and wishes them Merry Christmas. Chika later comes to Yuno's apartment in the middle of the night after Sae refused to give Chika her autograph. Sae, Miyako, and Hiro come by too and they stay up late into the night. On Christmas day, Chika oversleeps and leaves quickly to meet someone in a neighboring town. Yuno and her friends spend the rest of the day together.

Accompanied by her mother, Yuno comes to Yamabuki Art High School to take the entrance exam. After getting accepted into the school, she settles in the Hidamari apartment and makes friends with the new neighbors.

Sae's little sister, Chika, has just passed a high school entrance exam. Meanwhile, the Hidamari residents realize that they also had a similar experience exactly one year ago.

Yuno and Miyako visit a Shinto shrine near Iwakaba, a place recommended by Yoshinoya, by a train. After that, they spend their time together, drawing pictures of the landscape around the shrine.

March 16th-23rd: A male stray cat starts to live in Miyako's room. After a few days, however, the cat disappears from Hidamari apartment, making Yuno cry. October 31at: Yuno prepares for the cultural festival, the result of which is shown in the tenth episode of the previous season.

After visiting the Hidamari apartments, Chika chats with her friends and enjoys dumplings, which is her favorite dish. After that, they go to a karaoke box, but are soon disappointed that the place is closed for business. They instead head to a communal bath house, where they meet Yoshinoya and spend their time singing various songs together.

July 30th: Sae tries to finish her novel and goes to a café for an appointment with the monthly magazine editor. Before the talk with the editor, Sae confronts Natsume, in which Sae hopes Natsume doesn't find out about her profession. Afterward, Sae asks her friends whether any of them have experience of falling in love as she needed some inspiration for her romantic novel. In the night, Sae gives a phone call to Chika as she was apparently worried about her sister. November 11th: Sae and Hiro participate in a cooking class, where Hiro shows off her experienced skill in cooking. After the class, Hiro discovers Natsume in a flurry, buying a monthly magazine in which Sae's romantic novel, which was written during the first part of the episode, is published.

Yuno and Miyako attend the school entrance ceremony, in which Miyako falls asleep due to principal's tedious speech. Meanwhile, Hiro and Sae stay at the Hidamari apartment and they happen to meet with Misato and the landlady in the morning. After the ceremony, Hiro and Sae makes a surprise welcome party for the new Hidamari neighbors.

Students of Yamabuki Art High School, including Yuno and her friends, participate in a sports day event. Yuno's class under Yoshinoya represents the red team, while Natsume's class represents the white team. Later, the red team manages to defeat its rival, the white team. After the competition, Yuno and her friends together go back to their apartment and look back what they have done during the day.

August 5th: Yuno and Miyako's teacher, Yoshinoya, has to finish the remaining school works during the summer break under the Principal's watch. However, she keeps slacking off from her work as she takes photographs of herself, which will be used for the postcards that she will be sending out to the students. When Natsume discovers Yoshinoya in the school, Yoshinoya asks her to put some of the postcards in the mailbox of Hidamari apartment. December 3rd: Yuno and her friends goes out to watch a movie, which is directed by a Kishi who is a graduate from Yamabuki high school. After that, Yuno and her friends discover that Sae has received a letter from a fan of her literary work.

Yuno's class spend the day sculpting replicas of their shoes. Later, Yuno's parents make a surprise visit to Hidamari apartment.

In the early morning, Yuno makes onigiri bentos for Miyako and herself. When it is a lunch time, Yuno goes up to the rooftop of Yamabuki high school, which is prohibited area for students. After a brief assault of hungry pigeons, Yuno falls asleep on the rooftop. After the PE class in the afternoon, Yuno and her friends finds out that Hiro has been missing. When Yuno goes back to the dressing room to pick up the jerseys that she left, she hears a strange noise behind a door, where an unconscious Hiro is found. Then Yuno and her friends come to the conclusion that Hiro had stopped eating to fit into a tight pair of pants, where in actuality, Hiro had bumped her head on the low ceiling while putting them on.

After a small quarrel between Sae and Hiro, they have suddenly become antagonistic to each other. After noticing the tension between the two in the school, Yuno and Miyako tries to restore their friendship by inducing Sae to apologize to Hiro. Fortunately, their plan works out as Hiro accepts Sae's apology. Meanwhile, the landlady receives a bamboo trees as a present from one of her part-time job customer and she then decides to plant it next to the Hidamari apartment. After noticing the trees, the Hidamari residents celebrates Tanabata by putting up decorations on the bamboo trees and hanging small colorful papers with their wishes written.

Yuno returns to the apartments after going back to her hometown during winter break. The girls talked about what they did during the break and then decides to visit the temple after. On the way there they visited Yoshinoyo sensei's house and invited her to come with them to the temple. While they were at the temple they made New year wishes and then went home. After they went home they talked about all sorts of stuff like what they did last year and what they want to do this year.

February 27th-March 4th: After a bad start to the day breaking some plates, Yuno gets a low score on her grammar test and has to take a makeup exam. After studying for the retake, she gets a perfect score, but accidentally rips her sheet. On April 1, Yuno hears from the landlord that new freshmen will be coming to Hidamari Apartments, so the girls help clean the other rooms up. April 3rd: One of the freshmen's parents arrive with her things and offer to take the girls out to lunch. While they do that, the new freshmen, Nazuna and Nori, arrive at the apartments and are surprised that they cannot find anyone else. When the girls get back from their lunch, they meet with the new residents and officially welcome them to the apartments.

The girls hold a welcome party for Nazuna and Nori. Miyako brings a 'question dice' in order to find out things about the freshmen. The next morning, the gang are surprised to hear Nazuna is in general education instead of the arts department like they had assumed. Miyako thinks back to July 19th of the previous year when she accidentally set a small part of her hair on fire, and she and Yuno went to a hair salon named Olive run by twin hairdressers.

After the first day back at school, Yuno has trouble deciding what electives to take. After talking with Sae and Hiro, she decides on planes. Back on December 10th, Yuno runs into Sae at the bookstore, where they learn her the magazine which published her novella has already sold out. They later go to a café where Sae talks about whether she should aim for further teaching in literature or art.

Natsume gets a brief chance to walk home with Sae. Yuno, Miyako, Nori and Nazuna go to a home store to buy some new curtains for Nori's apartment, since her current ones are too short. Much to Nazuna's surprise, Nori goes with her suggestion. After running into the landlady at the gardening section, they buy a bunch of tomato seedlings to plant in the garden. Afterward, everyone has dinner at Hiro's place, and Nazuna and Nori start to bond.

The girls go in for their physical exams, and Yuno is not too pleased with her results, which say she has shrunk since last year. Yuno gets a wrong number call from Arisawa, a former senior, and thinks back to when she met her on January 31. Yuno had left her cell phone at school, which was found by Arisawa who was drawing in the classroom. She draws a picture of Yuno and gives her some advice about college and the two become friends.

On October 15th of the previous year, Yoshinoya appears to be down, and is constantly checking her cell phone, leading Yuno and the others to think she may be in love. It later turns out she has been reading a romance novel on her phone. April 26th: The girls spot Nazuna on numerous occasions being assisted by boys and wonder if she is popular among them. When asked about it, Nazuna says she is not too keen with it since it makes their other girls jealous.

Sae's younger sister Chika visits the Hidamari Apartments once again, where she meets Nazuna and Nori for the first time. The girls plan a picnic at a nearby lakeside park and later recount what they did and talked about back at the apartment building. As Chika is the same age as Nazuna and Nori, the three of them are able to quickly become friends.

Yuno and Miyako hear from Nori about a delicious crab fried rice dish that is on the school menu for a limited time and become determined to try it. Unfortunately, it is sold out by the time they get to the cafeteria the next day, so Hiro makes them the dish with imitation crab. On September 26 of the previous year, Yuno struggles with drawing a motif, and feels depressed about the result when her drawing is not scored very high.

On November 22nd, a few months before Yuno and Miyako would come to the Hidamari Apartments, Sae and Hiro's were in their first year and shared the Hidamari Apartments with their seniors, Misato and Riri. Sae has had trouble sleeping due to her writing work, so Hiro decides she will move into the room next to her's to support her. May 21st: Yuno and Miyako do some sketching at the park, where they throw stones at a weird shaped rock in the river.

After accidentally flushing her apartment key down the toilet, Yuno asks the landlady for another one. While the landlady tries to find the spare key among various other junk, Yuno spends each night sleeping over at each of the residents' apartments. After five nights, the landlady manages to find the spare key and Yuno finally returns to her apartment, only to be greeted by a foul smell from some leftover cooking.

On June 5th, it begins raining and will continue for the rest of the day. Yuno and Miyako see a puzzle involving matchsticks on TV where the answer is revealed to be online, so they head over to Nori's room to check it on her computer; Nazuna had already come over. After playing for a bit on the computer, they order a pizza around noon and later Hiro and Sae also come over for the same reason Yuno and Miyako had. Back on February 16, the seniors are participating in a tradition where they display voluntary final projects around the school. Yuno realizes that Hiro and Sae will be graduating the following year and that she and Miyako will soon become second-year students. On March 7th, Yuno and Miyako enjoys the cherry blossoms during the graduation ceremony.

The girls pick the tomatoes they planted in the garden of Hidamari Apartments earlier in the year. After they spend the day preparing tomato-based dishes, the landlady joins them for dinner, and later they give Yoshinoya the leftover pasta sauce.

May 6th-15th: Sae and Hiro are getting ready for the third-year's trip to Hokkaido. The other girls seem just as excited, even though they aren't the ones going! May 16th-18th: Whilst Sae and Hiro are away, Yuno and Miyako are the senior classmates in Hidamari Apartments. Yuno decides to try and set an example for Nazuna and Nori as a reliable senpai.

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.