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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.