Miyagawa Atsushi is an 11-year-old boy who is 180 centimeters tall. Since he has a grown-up looking build but acts his age, he has always been running into troubles. On the other hand, his 17-year-old elder sister Atsumi is only 137 centimeters tall. Even though she has a childish looking build, Atsumi takes good care of Atsushi. 

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

A four-panel manga.<br><br>
Miyagawa Atsushi is an 11-year-old boy. Since he is 180 centimeters tall and has a grown-up looking build, he has always been running into troubles. On the other hand, his 17-year-old elder sister Atsumi is only 137 centimeters tall and has a childish looking build. Atsumi takes good care of Atsushi, who acts his true age.

Midori-chan