On the surface it seems as if Atsushi is an adult, but really he's just an elementary student! However, he is paired with a second-year high school student Atsumi, whose height is just the opposite of his. These two together create an unusual relationship and will undoubtedly instigate some comedic antics in this slice of life comedy!
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