As Atsushi prepares for a recorder exam, his appearance to others leads him into a tough situation when he tries to talk to one of his classmates.

Atsumi takes Atsushi shopping with her.

Sayo and Atsumi discuss what kind of guys they like.

Atsushi's elementary school teacher, Futami Moriyama, has problems dealing with Atsushi. Later, being with Hina, Atsushi has a run-in with authorities again.

Atsushi has to dress up as demon for the winter solstice bean throwing. Atsushi is proving to be a very good demon, almost too good.

Atsushi receives a lot of chocolate from the other girls on Valentine's Day.

Sayo goes to the movies with Atsumi and Atsushi, unaware that Atsushi is Atsumi's little brother.

Atsushi is invited to Hina's house for Hinamatsuri, but is turned away by her suspicious parents.

Atsushi and Atsumi's neighbour, Take, comes over after breaking up with his girlfriend and quitting his job.

Atsushi gets help from Atsumi to make some gifts for White Day.

Atsushi tries to do his homework at the library, where he encounters Sayo again.

Atsushi faces yet more misunderstandings with the police.

Atsushi and Atsumi stumble upon a Ms. Moriyama, who is very drunk; she takes this opportunity to express some feelings with Atsushi

As a new school year starts, both Atsushi and Atsumi face misunderstandings with the new batch of students.

Atsushi's friends try to teach him how to ride a bike without training wheels.

Atsushi and Atsumi think about what they want to do in the future.

As Atsumi ends up making too many snacks for Atsushi and his friends, she invites over Sayo, who continues to misunderstand who Atsushi really is.

Atsushi, Atsumi and their family go to a hot spring inn where Atsumi's height becomes a bother for her.

Atsumi has to act as Atsushi's parent so he can participate in his school's sports festival.

Atsushi and Atsumi have lunch with Sayo before participating in a relay race.

Sayo learns the truth that Atsushi is Atsumi's little brother.

Atsushi wears some clothes handed down from Take, which prove to be a bit controversial.

Atsushi and his friends go to Atsumi's school culture festival where he runs into Sayo.

Sayo mentions to Atsumi she has always wanted a little sister.

A game of hide and seek soon turns into a frantic escape from the cops for Atsushi.

Atsushi joins Atsumi and Sayo to a family restaurant.

Unaired episode bundled with the special edition of volume 4 of the original manga.

Whilst visiting Take's part time job at a bar, Atsushi is mistakenly hired as a bartender.

Atsushi is taken to meet a new police recruit, Aono, before going to the arcades with his friends.

Sayo and Hina briefly stop by Atsushi's house to shelter from the rain.

Atsumi has to deal with the similarly short Kobayashi and perverted lolicon Yoshioka.

The new student teacher, Miss Kawauchi, tries to make a move on Atsushi...

Sayo is stressing over the feelings she has for Atsushi that never reach him, when suddenly...

The next-door neighbor, Take, has a tendency to quit jobs as soon as his workplaces romances go awry. But today, something is different...

After constantly suffering at the whims of Yoshioka, Makoto Kobayashi - also known as Tiny - finally resorts to his trump card...

As if Yoshioka weren't enough of a handful, now it turns out he's Atsushi's brother?! Another unexpected new character joins the mix, bringing further chaos to the Miyagawa family and friends...

The whole gang decides to check out a haunted house, each with their own high expectations. Thrilling and chilling developments only accelerate the chaos...

Some lazy, some efficient... everyone handles summer vacation in their own way. Where good things happen, so shall bad things as well...

Will any conclusion be reached among these supremely chaotic relationships? Or has nothing changed at all? No, no, perhaps the changes just aren't visible...

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Something good always happens in the wake of something bad? Don't assume summer vacation will last forever.