The class goes on a school trip to help out in a rice field, where Natsumi and Komari end up getting stuck in the mud. Later that night, Komari gets frightened after seeing a scary movie, which is not helped by Natsumi. After getting into a fight with her mother, Natsumi runs away from home with Komari in tow and goes to her secret hideout. They eventually spot a cat that had put Natsumi in trouble in the first place, but leave her alone when they see she is feeding her family and eventually head home.

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.

With Kazuha absent at the start of the new semester, the girls try and find ways to pass the time in class. Later, Hotaru and Renge try and catch a rabbit that had escaped from its pen, only for it to lock them inside the pen themselves, though they are eventually rescued by Kazuha. Afterwards, Renge visits the candy store run by Kaede Kagayama, who finds her to be a handful.

Since the school doesn’t hold cultural festivals, Natsumi suggests they hold their own and invite the alumni, including Kaede, Konomi and Hikage. At the festival, the girls run a café, hold an art exhibit and put on a play. However, they’re play ends up being overwhelming and they end up slacking on food orders. They do eventually work together to prepare some food and have fun. Afterwards, Komari and Konomi help clean Natsumi’s room, where they find a lot of old toys.

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.

As Spring arrives again, Hotaru and Komari go on a picnic together, where Hotaru ends up eating Komari’s botched up homemade lunch in order to not hurt her feelings. Later, the girls get together to search for some edible plants, eventually coming to a field of renge flowers where Natsumi makes a costume for Renge.

A few days after transferring in, Hotaru and the others play a game in which they try to knock each other’s rulers off a table. Later, Hotaru gets lost while walking her dog Pechi, but manages to get pointed back towards home thanks to Pechi’s scent. Afterwards, Hotaru goes with Komari to watch the stars together, but run into trouble when their flashlight runs out of battery before they head back. Thanks to a wayward bottle cap Komari dropped, they soon manage to make their way back home.

When Renge receives a bike from her grandma, she’s eager to practice so she can ride everywhere with her friends. But the rainy season is in full swing, so she sets about making a teru-teru bouzu in hopes that the rain will stop. Meanwhile, Renge is on duty to take care of the tadpole shrimp she caught while playing in a field, and she grows very fond of them.

As everyone is cleaning up the school on the last day of the semester, Natsumi and Hotaru end up weeding and watering the garden together. Natsumi realizes she’s never been alone with Hotaru before and tries to come up with things to talk about… Then summer vacation begins and the kids start to work on their summer homework, but quickly grow bored. Hotaru then tells everyone her parents are going to buy some fireworks…

The second semester has begun, and the Asahigaoka students are making wood crafts in class. Renge and Natsumi pair up to make something together, but can’t come up with any ideas. Just when Natsumi starts to panic, Renge demonstrates her unique sensibilities again. Then at lunchtime, the smell of curry fills the air, and the Koshigaya sisters recall a tragedy that befell the school long ago…

Renge goes to visit Natsumi, but she and her family aren’t home. She’s about to give up and leave when a hand starts talking to her from the other side of the fence! She thinks it’s a monster, and is relieved to learn that it’s the next door neighbor Konomi. But Konomi then tells her that she is, in fact, a monster… Later, the Koshigaya sisters tell Renge they were in first grade when they took off their training wheels, so Renge starts to practice riding her bike without the training wheels.