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

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

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

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...

Atsumi takes Atsushi shopping with her.

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.

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'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 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.

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

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