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

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.

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

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

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 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.

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

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

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

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

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

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

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

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...

Atsushi joins Atsumi and Sayo to a family restaurant.

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

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...

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