Minami-ke

Chiaki lashing out at Uchida, Kana, and Maki due to their boisterous laughter rousing her from a nap on a warm spring day gives way Kana first sending in Uchida and Maki to fight this battle for her before doing her own dirty work only to have it end in a stalemate. The next arc features Makoto and Uchida taking an afternoon nap with Kana when Maki pays the trio a visit with the request that Kana gaze upon her sleeping face while recalling a dysphoric middle school memory, especially after Kana reads Maki and Uchida sleeping as the perfect opportunity to draw on their faces as a prank. The arc thereafter features Haruka and Atsuko looking at pictures from their middle school days. The arc that ensues has Chiaki sewing on a wayward button while Kana detects Haruka's school uniform carelessly strewn about before remarking of the seasonal uniform transition. While modifying a shirt of Kana's, Chiaki accidentally slices Haruka's fuku skirt. Knowing that Haruka will be very angry with them when she detects the damage, Kana and Chiaki attempt some desperate and frenzied repairs to buy time for computing their next move. Unfortunately, things coming unraveled when Maki detects the telltale thread put both Kana and Chiaki in scalding hot water with Haruka. The final arc features Kana blowing up at Chiaki for insulting her once too often before deciding to resolve her fears of Chiaki becoming a delinquent by being a nice older sister. Unfortunately, all Kana accomplishes is to greatly unsettle Chiaki and frighten her into co-sleeping with Haruka.

Caught up in a sudden rainstorm, Touma is forced to make an emergency stopover at Chiaki's house but finds that the hospitality comes with a price: Chiaki refusing to lend Touma any clothes due to her abrasive conduct. Though she initially misinterprets Natsuki's counsel on her conduct, Touma finally catches the lesson -- and a set of clean clothes. The next arc features Chiaki's lack of discretion and foresight with her affinity for trivia and facts. Fortunately, Fujioka helps Chiaki put her error in this area into perspective. The arc that follows thereafter details the prologue of the social dynamic Fujioka is involved in with both Chiaki and Touma: Chiaki mortifying Touma out of Fujioka's lap. The arc after that details that Natsuki has the same problem of abrasive conduct about which he earlier lectured Touma who enters the room and seats herself at the table. However, Natsuki's attempts to heed his brothers' counsel along with Touma's opinions of the Minami sisters sour the ambiance.

During the homebound commute, Uchida and Yoshino's stopover to buy some baked yams during the homebound commute gives way to Kana explaining to them her »Laws of Popularity«. Availing a bunch of soda cans, Kana directs Uchida and Yoshino through an exercise with soda cans to practice the Law of Weakness Appeal. Unfortunately, Chiaki (especially after the soda geyser) is not amused at the exhibition and Atsuko is put on the hot seat after Haruka takes Maki away. Touma imparting an emphatic »Watch where you are going!!!« punch to a contrite Makoto before walking away ultimately demonstrates that male-female interaction is as a kaleidoscope and that there are a myriad of variables in play. While Kana spends the next arc fishing for iconoclastic responses, Atsuko shares her »cool when silent« perspective of Hosaka before later comparing notes with Maki leads into a comical social sequence in which Hayami and the approaching Hosaka along with Maki and Atsuko seem to have completed these cerebral computations without verifying the results with the outside world.

A euphoric beach outing having the dysphoric prologue of Kana being carsick is reflected upon warmly by Uchida and Yoshino who have taken the whole experience in stride. Yoshino remarks that Chiaki has become attached to Fujioka as an elder sibling in much the same way that Kana has with Uchida and her. Chiaki's exhortation for the whereabouts of her teddy bear disrupts the reminiscence; fortunately, Fujioka brings it back and Kana successfully obfuscates her role. Maki tempers her disdain for her summer homework by successfully wielding Fujioka's computations as her plaything until Kana and Chiaki extinguish her machinations. The next arc features Uchida having a near-complete computation crash as she struggles to complete her summer homework without Chiaki's counsel as the penance for abusing Chiaki's goodwill. Fortunately, Chiaki is not heartless; she eventually relents after seeing Uchida and Makoto's demonstration of interdependence being a two-way street. The final arc features Kana's attempts to forestall the approaching autumn backfiring upon her as Chiaki, galvanized by all the pranks Kana played on her, retaliates by eating Kana's dinner in addition to her own.

In spite of being the reason for Touma's earlier »Hands off!!!« repulsion, Kana decides that Touma is getting out of hand while making the same mistake with Chiaki at dinner. Haruka swiftly answers the dominance question between Kana and Chiaki right before Touma arrives again with a slideshow of her family government. Kana gives Touma a photograph to show Natsuki that causes a computation crash. The next arc depicts the Minami brothers discussing what to give Touma for her birthday and revealing that Natsuki is the second-generation Banchou that has gotten into a misunderstanding with one of his classmates Hitomi who is fishing for insight regarding maturity and thinks that she can determine Natsuki's thoughts via eye contact.

Touma pays the Minami sisters a visit with an unknown payload whose revelation Chiaki objects in Haruka's absence. Though she inhibits herself for the time being, Kana begins to succumb to avarice when Fujioka comes for a visit. What follows is an exercise in game theory in which Kana leads Chiaki through an enigmatic scenario to obfuscate her volition for having the entire payload to herself since Haruka's estimated arrival time is an unknown variable. Kana's only mistake is that she forgets to consider all the players. The next arc features Haruka and Chiaki being rather vague and indirect about the supermarket and the route thereof as well as a neighborhood dog giving way to Chiaki encountering a shopping list that she suspects that Kana tampered with. The arc thereafter details Hayami comparing notes with Maki regarding Hosaka before she gets the idea to wield Hosaka's computations as her plaything. Hosaka tries befriending Maki and Atsuko but is puzzled when they swiftly flee. The final arc features Haruka taking notes from a cooking show about the preparation of curry while detecting the necessity of visiting the supermarket. Chiaki taking on this stewardship with the very notes that Haruka was taking earlier ends up inspiring Hosaka and herself an extra spicy curry.

Chiaki helps to prepare for a school sports meet. Meanwhile, the sisters learn that Fuyuki is moving and is forced to leave in the middle of the sports meet. Kana learns that Haruka has been selected to study abroad.

Spring has sprung and the Minami sisters are sitting around the kotatsu talking. Chiaki confuses 'skirt steak' (harami) with 'flower viewing' (hanami) and is teased by Kana. To save Chiaki, Haruka suggests going flower viewing, though it is still too early.

A local shop owner gives Haruka tickets to a new indoor pool. We learn that Chiaki doesn't know how to swim and doesn't want the others to find out. Later, Kana tries to teach Chiaki how to swim and help Chiaki meet her goal to swim 100 meters. Haruka sleeps the entire time, trying to ignore her sisters, until her highschool friends throw her into the pool.

The power goes out and the Minami sisters invite Fuyuki over.

During a routine garbage disposal trip, Haruka encounters a boy of Chiaki's age named Fuyuki who is warmly praised by his neighbors for his willingness to freely volunteer his assistance. It is during this encounter that Fuyuki's participation in the weekend neighborhood clean-up is mentioned. Kana's reluctance to take part prompts Haruka to force her and Chiaki to also participate. Later on, Kana summons a few of her classmates, as well as Chiaki's friends to lighten the workload. During the actual clean-up event, it becomes apparent that the work crew Kana assembled was so that Kana could watch while everybody else does all the work.

Kana decides to help her sister become the Great Bancho once more by making the Kana army, but Chiaki on the other hand couldn't help because she considered her friends useless. In the end of the episode they find out Haruka was just refusing a phone call to become class rep.

The Minami family and the neighboring Minami family are having their own Christmas eve, while Hosaka is preparing a soba bowl to impress Haruka.

Toma, a tomboy from another Minami family, is introduced while Makoto is still pretending to be a girl in front of Haruka.

Hosaka tries to get close to Haruka by making impressive bentos for her.

Chiaki invites her friends over to work on home work. Kana asks Makoto what type of girls does he perfer. Haruka comes in and Makoto decides to help Haruka cook. The next day Chiaki ignores Makoto the whole day. Makoto comes over with Uchida the next day and Kana dresses him up like a girl.

Takeru visits Minami family. Riko has a crush on Fujioka, but is frustrated by his relationship with Kana. Meanwhile, Hosaka imagines what it is like to be a part of Minami family.

The Minami sisters' daily school life is shown. Some of their classmates are introduced as well.