Episodes
1. The New Students and the Misunderstanding
As a new school year starts, both Atsushi and Atsumi face misunderstandings with the new batch of students.
2. Atsushi and the Bike
Atsushi's friends try to teach him how to ride a bike without training wheels.
3. Atsushi and his Dream
Atsushi and Atsumi think about what they want to do in the future.
4. Pastries and Cheering
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.
5. Family and Hot Springs
Atsushi, Atsumi and their family go to a hot spring inn where Atsumi's height becomes a bother for her.
6. Atsushi and Sports Day - Part 1
Atsumi has to act as Atsushi's parent so he can participate in his school's sports festival.
7. Atsushi and Sports Day - Part 2
Atsushi and Atsumi have lunch with Sayo before participating in a relay race.
8. Misunderstandings and Truth
Sayo learns the truth that Atsushi is Atsumi's little brother.
9. Atsushi and Hand-Me-Downs
Atsushi wears some clothes handed down from Take, which prove to be a bit controversial.
10. Atsushi and Culture Fairs
Atsushi and his friends go to Atsumi's school culture festival where he runs into Sayo.
11. Big Sister and Little Sister
Atsumi and Sayo spend some time together
12. Atsushi and Chases
A game of hide and seek soon turns into a frantic escape from the cops for Atsushi.
13. Atsushi and Bye-Byes
Atsushi joins Atsumi and Sayo to a family restaurant.